全新版大学进阶英语：综合教程2（思政智慧版）

全新版大学进阶英语：综合教程3

全新版大学进阶英语：综合教程3的配套网络课程及移动学习资源包将背单词、练语音、听音频、看视频、写作文、做练习等学习内容有机整合，结合课本内容与课外补充，帮助学生自学自测，方便教师监督管理。

全新版大学进阶英语：视听说教程3

全新版大学进阶英语《视听说教程》网络课程可用于课堂教学外的巩固与补充，也可作为学生独立学习的网络课程。该课程选用美国《国家地理》的素材，图片震撼、场景真实、语言地道。《视听说网络课程》注重听力技能和口语表达的训练，练习设计循序渐进，科学合理；为兼顾四级考试的需求，网络课程每单元均含四级听力与口语训练的练习。听力播放支持语速调节，口语训练实现了较好的人机交互功能，便于学生根据自身需求进行个性化学习。

新闻听力 | 炎热天气让人变得迟钝

炎热天气让人变得迟钝Heat Might Cloud Your Brain常速 | 六级（易） | 526词 | 3min31s刘立军供稿Part I. QUESTIONSListen to the passage and choose the best answer to each question you hear.Q1. What is one way extreme heat can affect people, according to the passage?A. It can increase the speed at which people complete tasks.B. It can improve people’s ability to solve difficult problems.C. It can help people remember information more easily.D. It can make it harder to think and make good decisions.Q2. What did the Boston study find about students without air conditioning?A. They were more comfortable while studying.B. They performed less well on the tests.C. They were better at solving numerical problems.D. They completed both tests in less time.Q3. Why does the speaker mention the limitations of the Boston study?A. To show that its findings should be interpreted with some caution.B. To suggest that the researchers used the wrong testing methods.C. To explain why high temperatures affect only university students.D. To prove that air conditioning has little effect on learning.Q4. What did the large study in China suggest about long-term exposure to extreme heat?A. It has little effect unless people suffer heat stroke.B. It mainly affects people’s physical strength.C. It may be linked to a decline in cognitive ability.D. It can improve memory after repeated exposure.Q5. What does the speaker suggest people do when they have to make an important decision on a very hot day?A. Avoid asking others for advice about the decision.B. Make the decision quickly before becoming tired.C. Trust their first reaction rather than overthink it.D. Cool down first and consider the decision carefully.Part II. TRANSCRIPTHow Heat Waves Affect Your BrainHeat waves are becoming more common in many parts of the world. Most people know that extreme heat can cause health problems, such as heart and breathing difficulties. In serious cases, it can even lead to heat stroke or death. But there is another effect of extreme heat that we may not think about: it can affect the way our brains work.When the temperature gets too high, our bodies try to keep us cool. More blood and energy are sent to parts of the body that help control our temperature. As a result, the brain may receive less blood than usual. Scientists are still studying exactly how this process affects the brain. (Q1) However, research has already shown that high temperatures can make it harder for people to pay attention, remember information, solve problems, and make good decisions.One interesting study was carried out during a heat wave in Boston in 2016. Researchers studied university students living in different buildings. Some students had air conditioning, while others did not. The students with air conditioning stayed in rooms with an average temperature of about 21°C. The rooms without air conditioning were much warmer, with an average temperature of about 26°C.For 12 days, the students completed two simple tests each day. One test involved adding and subtracting numbers. The other was a test of attention. (Q2) The results were clear: students in the warmer rooms performed worse. They answered fewer questions correctly and took longer to complete the attention test.(Q3) Of course, one study cannot tell us everything. The number of students was relatively small, and they were all university students. However, other studies have found similar results. When people are exposed to high temperatures, they often have more difficulty paying attention and remembering information. They may also be slower at solving problems and making decisions.There is also evidence that long-term exposure to extreme heat may affect our brains. In one large study, researchers followed more than 53,000 people in China for eight years. (Q4) They found that people who experienced more very hot days tended to perform worse on tests of memory and mathematical ability. The researchers estimated that if the number of extremely hot days increases in the future, average human cognitive ability could decline.The effects of heat are not the same for everyone. Older people, for example, may be more strongly affected. People with certain physical conditions may also face greater risks. In addition, even a short period of extreme heat may affect our thinking for some time afterward.So what should we do? The simplest advice is to avoid making important decisions when we are extremely hot. If possible, wait until you are in a cooler environment. (Q5-1) When a decision cannot be delayed, take your time, check your reasoning carefully, and ask someone else for advice.We often use the expression “in the heat of the moment” to describe a decision made without enough thought. As heat waves become more common, the expression may have a more literal meaning than we realize. (Q5-2) When the weather is extremely hot, cooling your body may be a good way to help your brain work better, too.Part III. KEYQ1. D.【解析】理解题。题目出处为：“However, research has already shown that high temperatures can make it harder for people to pay attention, remember information, solve problems, and make good decisions.” 意为：“研究已经表明，高温会使人们更难集中注意力、记忆信息、解决问题和做出正确决定。”因此正确答案为D。Q2. B.【解析】细节题。题目出处为：“... students in the warmer rooms performed worse. They answered fewer questions correctly and took longer to complete the attention test.” 意为：“……处在较热房间里的学生表现更差，他们答对的问题更少，完成注意力测试所花的时间也更长。”因此正确答案为B。Q3. A.【解析】推断题。题目出处为：“Of course, one study cannot tell us everything. The number of students was relatively small, and they were all university students.” 意为：“当然，一项研究不能说明所有问题，因为参与者人数较少，而且都是大学生。”由此可以推断，研究样本有限，因此其结果需要谨慎理解，不能简单推广到所有人群。故正确答案为A。Q4. C.【解析】理解题。题目出处为：“They found that people who experienced more very hot days tended to perform worse on tests of memory and mathematical ability.” 意为：“研究发现，经历更多高温天气的人，在记忆和数学能力测试中的表现往往更差。”由此可知，长期暴露于极端高温可能与认知能力下降有关，因此正确答案为C。Q5. D.【解析】细节与推断题。题目出处为：“When a decision cannot be delayed, take your time, check your reasoning carefully, and ask someone else for advice.” 以及结尾处“… cooling your body may be a good way to help your brain work better, too.” 意为：“如果一项重要决定无法推迟，反而应当慢慢考虑，仔细检查自己的思路，并向他人寻求建议。”以及“给身体降降温，可能也有助于让大脑更好地运转。”因此可以概括为在高温环境下做重要决定前，应先给自己降降温并认真思考，故正确答案为D。 （本文图片来源于摄图网，版权归摄图网所有)

猫薄荷为何让猫“疯狂”？

猫薄荷为何让猫“疯狂”？Why Does Catnip Make Cats Go Crazy?文本难度：考研刘立军供稿Of the many bewildering behaviors cats display, one of the strangest is their obsession with a specific species of plant. After just one whiff, even the most stoic cat can start pawing, drooling, biting, and wriggling in a state of pure feline euphoria. So, why do cats go crazy for catnip? This is the question cat behavior expert Masao Miyazaki and chemist Toshio Nishikawa set out to answer in 2013. Along with their research teams from Iwate and Nagoya University, they began by studying silvervine – a plant that sparks a similar response to catnip.猫咪有着许多令人费解的行为，其中最奇特的莫过于对某一特定植物的痴迷。即便是最冷静自持的猫，哪怕只是闻上一口，也会瞬间陷入抓挠、流口水、啃咬、翻滚的状态，沉浸在纯粹的猫咪欢愉中。那么，猫咪究竟为什么会为猫薄荷神魂颠倒？2013年，猫咪行为学家宫崎正夫与化学家西川俊夫便带着这一问题展开了研究。他们与来自岩手大学与名古屋大学的研究团队携手，先从木天蓼这种植物入手——这是一种同样能在猫身上引发和猫薄荷相似反应的植物。First, the researchers painstakingly extracted chemical compounds from the plant and dribbled various combinations of them onto filter paper. Then they brought in some cats and studied which compounds they were drawn to. Overwhelmingly, their feline testers pounced on the papers containing nepetalactol. And when Miyazaki and his student Reiko Uenoyama ran blood tests on the cats who’d interacted with nepetalactol, they found their systems were flooded with endorphins. These hormones block pain signals, relieve stress, and generally create a happy, calming effect. And catnip triggers the same endorphin rush with a similar chemical called nepetalactone, and it’s this flood of happy hormones that gives catnip and silvervine their signature drug-like response.研究人员先是费尽心力，从木天蓼中提取各类化合物，再把不同配比的提取物滴在滤纸上。随后，他们找来猫咪，观察哪些化学成分会吸引它们。结果显而易见，绝大多数受试猫咪都径直扑向含有荆芥内酯醇（nepetalactol）的滤纸。宫崎正夫和他的学生上野山怜子对接触过荆芥内酯醇的猫咪进行血液检测，发现它们体内会大量分泌内啡肽。这类激素能够阻断痛觉信号、缓解压力，带来愉悦、镇定的感受。而猫薄荷则是借助一种结构相近的物质——荆芥内酯，同样能刺激猫体内大量释放内啡肽。正是这种快乐激素的迸发，让猫薄荷和木天蓼产生了标志性的、类似药物带来的反应。These compounds don’t just trigger this effect in small cats. When the researchers brought nepetalactol-treated filter paper to a few zoos, leopards, lynxes, and jaguars all dove face-first into the compound. This was big news. If these different cat species reacted to nepetalactol the same way, the response was likely a shared evolutionary trait, potentially something important to cat survival that stretched back millions of years. When the silvervine researchers presented their work at a conference, one evolutionary biologist raised a compelling theory. In chemical terms, both nepetalactol and nepetalactone are classified as iridoids – a type of natural compound known to contain insect-repelling properties. So perhaps cats rubbing their faces in silvervine and catnip were applying an ancient form of bug spray.这类化合物并非只对小型猫科动物生效。当研究人员把滴有荆芥内酯醇的滤纸带到几家动物园时，豹子、猞猁和美洲豹全都一头埋上去嗅闻。这是一项重大发现。既然这么多不同种类的猫科动物都对荆芥内酯醇产生相同反应，说明该行为极有可能是共有的进化特征，或许关乎猫科动物生存的重要本能，其根源可追溯至数百万年前。当木天蓼研究团队在学术会议上展示成果时，一位进化生物学家提出了一个极具说服力的假说：从化学分类来看，荆芥内酯醇与荆芥内酯都属于环烯醚萜类化合物，这类天然物质具备驱虫特性。所以，猫咪把脸在木天蓼和猫薄荷上蹭来蹭去的行为，或许正是在涂抹一种古老的驱虫剂。To test this, researchers set up cages of mosquitoes that cats could stick their heads into. And sure enough, the cats that had been treated with nepetalactol got fewer mosquito bites than the cats in the control group. The same effect was true for the scientists who’d volunteered their arms in solidarity with their feline subjects. These mosquito-repelling properties are currently our best explanation for why cats love silvervine and catnip. But researchers still had one more question: in their state of euphoria, cats tend to vigorously bite, lick, and rub against these plants. But do cats really need to go this crazy to get their bug-repelling effects?为验证这一猜想，研究人员搭建了放有蚊子的笼子，猫咪可以把头伸进笼内。结果证实，体表接触过荆芥内酯醇的猫咪，被蚊子叮咬的次数少于对照组。就连主动挽起袖子、甘愿和猫咪一同参与实验的科研人员，手臂上的叮咬次数也同样大幅减少。目前，这种驱蚊特性是我们解释猫咪喜爱木天蓼与猫薄荷最合理的假说。但研究者还有一个疑问：当猫咪在亢奋状态下，往往会使劲啃咬、舔舐并用力蹭擦这类植物。可它们真的需要表现得如此“上头”，才能真正发挥驱虫功效吗？To investigate rubbing, they provided cats with filter papers treated with microscopic amounts of nepetalactol. And sure enough, even these tiny doses made the papers irresistible, suggesting that microscopic amounts of bug repellent can be transferred by rubbing alone. As for biting and licking, the researchers found that when cats damage the plant, the leaves actually produce more mosquito-repellent chemicals. So your cat isn’t just ripping open their bags of catnip to be annoying; their evolutionary instincts are just trying to get even more of that bug protection.为研究摩擦行为，研究人员向猫咪提供了只沾有微量荆芥内酯醇的滤纸。不出所料，即便剂量微乎其微，这些滤纸依旧对猫咪有着极强吸引力。这说明，仅靠蹭一蹭，就能沾上微量的驱虫物质。至于啃咬和舔舐，研究人员发现，当猫咪啃破植物组织时，叶片反而会生成更多驱蚊化学成分。所以，你的猫咪扒开猫薄荷袋子并不是故意捣乱，而是在进化本能驱使下，想要获取更多驱虫保护。Cats are far from the only animal to use natural plants for purposes like this. Apes swallow scratchy and hairy leaves to dislodge parasites from their guts. Sheep munch on tannin-rich plants to kill intestinal worms, and monarch butterflies use toxic milkweed to kill parasites that normally impair their flight. Just like cats’ ability to find mosquito repellent, these behaviors can help humans identify useful plants and ingredients in the natural world. So, the next time you see your feline friend on a catnip binge, don’t worry – it’s only medicinal.并非只有猫咪会利用天然植物达成这类目的。猿类会直接吞下粗糙多毛的叶片，借此刮擦并排出肠道寄生虫；绵羊会食用富含单宁的植物来杀灭肠道蠕虫；帝王蝶则会采食有毒的马利筋，清除会削弱自身飞行能力的体内寄生虫。和猫咪寻找天然驱蚊植物的本能一样，这类动物行为，也能帮助人类发掘自然界里有价值的植物与成分。所以，下次看到你的猫主子沉迷猫薄荷，不必担心——这只是它在“用药”而已。【词汇】1.stoic adj. 坚忍的；沉着的2.whiff n. 一闻；一股气味3.drool v. 流口水4.wriggle v. 扭动；蠕动5.feline adj. 猫科的；猫的6.euphoria n. 欣快；极度愉悦7.catnip n. 猫薄荷8.painstaking adj. 煞费苦心的；极其仔细的9.dribble v. 使滴下；滴落10.pounce v. 猛扑；突然袭击11.endorphin n. 内啡肽12.lynx n. 猞猁13.jaguar n. 美洲豹14.dislodge v. 驱逐；移开15.munch v. 大声咀嚼16.intestinal adj. 肠的17.milkweed n. 马利筋（一种植物）18.binge n. 狂欢；放纵行为 （本文图片来源于摄图网，版权归摄图网所有)

双语阅读 | 为什么大型AI实验室正在大量招聘哲学家？

为什么大型AI实验室正在大量招聘哲学家？Why big AI labs are hiring so many philosophers?文本难度：CET-6刘立军供稿Ten years ago, as the AI revolution was gathering pace, arts and humanities students were told that, if they wanted to make themselves employable, they should “learn to code”. That may have been bad advice. These days, it is programmers who are nervous about AI taking their jobs.十年前，随着人工智能革命加速推进，文科生曾被告知，如果想让自己更具就业竞争力，就应该“学点编程”。但如今看来，这或许是个糟糕的建议。现在感到焦虑的已换成了程序员——他们担心自己的岗位会被AI取代。They might consider learning to philosophize. Earlier this year the Federal Reserve Bank of New York published figures showing that American philosophy graduates are more likely to have jobs than their peers who studied computer science. In 2024, the most recent year for which numbers are available, 7% of those who had studied computer science were unemployed, against just 5.1% of philosophers.他们或许才该考虑去学学哲学。今年早些时候，纽约联邦储备银行公布的数据显示，美国哲学专业毕业生比计算机科学专业的同龄人更容易找到工作。在数据可查的最近年份——2024年，计算机专业毕业生的失业率达7%，而哲学专业毕业生仅为5.1%。Many are being snapped up by AI firms themselves. Students get job offers before they have graduated, says Luciano Floridi, a philosopher at Yale University. Academics are moving, too. Dr Floridi describes the scale of departures from philosophy departments as a “hemorrhaging”.许多哲学专业毕业生正被AI公司直接抢走。耶鲁大学哲学家卢西亚诺·弗洛里迪表示，很多学生还没毕业就收到了工作录用通知。高校学者也在纷纷出走。弗洛里迪博士将哲学系人才流失的态势形容为一场“大出血”。Some of the lessons that philosophy can offer AI researchers are ancient. The Socratic method—as described by Plato, an ancient Greek philosopher—uses feigned ignorance and sequential questioning to clarify meanings, spot contradictions and reveal ramifications. Many current AI systems tend towards sycophancy. Models trained in the Socratic method, says Jörg Noller, an expert on philosophy and AI at Ludwig Maximilian University of Munich, are less keen on people-pleasing and more willing to pursue the truth.哲学能为AI研究者提供的某些洞见，其实古已有之。古希腊哲学家柏拉图所描述的苏格拉底诘问法，通过“假装无知”和循序渐进的提问，来厘清概念、发现矛盾并推演深层影响。然而，当前许多AI系统都存在一味迎合用户的倾向。慕尼黑大学哲学与AI交叉领域专家约尔格·诺勒表示，若用苏格拉底式方法来训练模型，它们会减少讨好用户的冲动，转而更坚定地追求真相。Philosophical training can also affect a model’s outlook in more specific ways. Feed an AI legal assistant the writings of John Locke, says Thomas Powers, a philosopher of technology at the University of Delaware, and it will favor robust property rights as an underpinning of political liberty. And if you don’t like those principles, the model-makers have others. The “Granite” series of models from IBM, an American computing giant, come with dials that let business customers better align outputs with their own corporate philosophies. Francesca Rossi, IBM’s head of responsible AI, says these can let users choose where to strike the balance between philosophical trade-offs, such as individual agency versus social harmony.哲学训练还能以更具体的方式，塑造模型的价值取向。特拉华大学技术哲学家托马斯·鲍尔斯指出，如果让AI法律助手研读约翰·洛克的著作，它就会倾向于将坚实的财产权视为政治自由的基石。如果你不喜欢这些原则，模型开发者还有其他选择。美国计算巨头IBM推出的“Granite”系列模型配备了调节旋钮，让企业客户能够更好地使输出结果与自身的企业理念相契合。IBM“负责任AI”负责人弗朗西斯卡·罗西表示，这些旋钮可以让用户在各种哲学层面的取舍间把握平衡，例如在“个人自主性”与“社会和谐”之间找到恰当的权衡点。Philosophy can help with safety, too. Researchers have documented all sorts of ominous behavior in AI models, including attempts to evade oversight and even blackmail their users. One way model-makers try to discourage this sort of misbehavior is called AI constitutionalism. This involves building a model around a scaffolding of rules and principles culled from philosophical writings with legal or moral authority.哲学也能在安全领域发挥作用。研究人员记录了AI模型中出现的各种令人担忧的行为，包括试图规避监管甚至勒索用户的行为。为遏制此类不当行为，模型开发者引入一种被称为“AI宪政主义”的机制。该机制要求以一套规则和原则作为底层支撑框架，而这些规范均是从具有法律或道德权威的哲学著作中遴选提炼而成。The biggest question, though, is what sorts of rules should be put in those constitutions in the first place. Philosophers have zeroed in on two main ethical frameworks. One is deontology. Popular with Kant, among others, this imposes strict rules that prohibit things like lying, coercion and treating people as a means rather than an end, even if it is for a greater good. Anthropic’s constitution incorporates many deontological strictures. These can make AI behavior more consistent, says Dr Powers—a plus for deploying robots in homes and public spaces.然而，最大的问题是：这些“宪法”中究竟应该纳入什么样的规则？哲学家们聚焦于两大核心伦理框架。其一是义务论。以康德等学者为代表，该理论强调设定严格的规则，禁止说谎、胁迫或将他人视为手段而非目的等行为，即使此举可能带来所谓的更大福祉。Anthropic公司的“宪法”便纳入了许多义务论式的刚性约束。鲍尔斯博士表示，这类规范可以使AI行为更加一致——这正是在家庭和公共场所部署机器人的重要优势。The other approach to ethics of interest to philosophers of AI is called consequentialism. It weighs costs against benefits to decide what to do. Models more sympathetic to consequentialism include OpenAI’s ChatGPT and Google’s Gemini. Google’s AI models are designed to produce “likely overall benefits [that] substantially outweigh the foreseeable risks”, a classic consequentialist goal.AI哲学研究者关注的另一种伦理方法被称为结果主义。它通过权衡成本与收益来决定该做什么。更倾向于结果主义的模型有OpenAI的ChatGPT和谷歌的Gemini。谷歌的AI模型在设计时明确以“可能带来的整体收益远远超过可预见的风险”为目标——这是一个典型的结果论目标。Consequentialist algorithms are also crucial in software for autonomous vehicles: if an accident is unavoidable, a decision must be made on the least tragic way to crash. Chris Gerdes, a senior engineer at Waymo, which makes self-driving cars, says the trend is to make driving software more consequentialist. Consequentialism is also central to AI weapon systems. Military objectives must be weighed against possible civilian deaths, says Jack Shanahan, a former head of the Joint Artificial Intelligence Centre, which studies AI for America’s armed forces.结果主义算法在自动驾驶汽车的软件中也至关重要：如果事故不可避免，就必须做出决策，以损失最小的方式发生碰撞。自动驾驶汽车制造商Waymo的资深工程师克里斯·格德斯表示，目前的趋势是让驾驶软件更深度地融入结果主义逻辑。结果主义也是AI武器系统的核心原则。曾负责为美军开展人工智能研究的“联合人工智能中心”前主任杰克·沙纳汉表示，必须在军事目标的达成与可能造成的平民伤亡风险之间进行权衡。Thorny problems abound—a philosopher’s favorite sort. Are there cases when deontological rules should be overridden? How do you make decisions when the consequences are unclear? Should AI systems take into account animal welfare, or the state of the environment? Would it be morally acceptable to prioritize young pedestrians over old ones? 棘手的问题层出不穷——正是哲学家最热衷探讨的那类问题。是否存在义务论规则应该被推翻的情况？当后果不明确时，该如何做出决策？AI系统是否应该考虑动物福利或环境状况？优先保护年轻行人而非年长行人，在道德上是否可以接受？Critics fret about “moral deskilling”: if computers increasingly make ethical calls, might people become less willing to make their own judgments? Roman Yampolskiy, an AI theoretician at the University of Louisville, argues that morality “is historically unstable, culturally variable, strategically manipulable, and often only retrospectively legible”. Unemployed coders take note: there seems to be no shortage of work for philosophers of AI.批评者担忧“道德能力退化”：如果计算机越来越多地做出伦理判断，人们是否会逐渐丧失自己做判断的意愿？路易斯维尔大学的AI理论家罗曼·扬波尔斯基认为，道德“具有历史的不稳定性、文化的可变性与策略的可操纵性，而且往往只能事后追溯其意义”。失业的程序员们请注意：AI哲学家的饭碗恐怕永远不缺。【词汇】1. humanities n. 人文学科；人文科学2. hemorrhage n. 大量流失（文中喻指人才流失）3. Socratic adj. 苏格拉底的；苏格拉底式的4. feign v. 佯装；假装5. ramification n. 衍生含义；复杂影响6. sycophant n. 谄媚者；阿谀奉承的人7. underpin v. 支撑；作为……的基石8. ominous adj. 不祥的；令人担忧的9. scaffolding n. 脚手架；支撑结构（文中喻指框架）10. cull v. 挑选；选取11. coercion n. 胁迫；强迫12. deontological adj. 义务论的13. stricture n. 戒律；严格限制14. ethics n. 伦理学；伦理15. outweigh v. 超过；比……更重要16. algorithm n. 算法17. tragic adj. 悲剧性的；可悲的18. fret v. 担忧；焦虑19. deskill v. 使技能退化；去技能化20. legible adj. 可读的；可理解的（本文图片来源于摄图网，版权归摄图网所有)

新闻听力 | 香烟如何影响身体？

香烟如何影响身体？How do cigarettes affect the body?常速 | 七级（偏易）| 699词 | 4min49s刘立军供稿Part I. QUESTIONSListen to the interview and choose the best answer to each question you hear.Q1. What substance in cigarettes is responsible for making smoking highly addictive? A. Tar. B. Carbon monoxide. C. Nicotine. D. Arsenic. Q2. What is one of the immediate physical benefits of quitting smoking? A. Improved eyesight and bone strength. B. Stabilization of carbon monoxide levels. C. Restoration of DNA repair processes. D. Reduced risk of erectile dysfunction. Q3. What happens to the cilia in the lungs after quitting smoking for 9 months? A. They are permanently damaged. B. They start producing harmful chemicals. C. They become less effective in cleaning airways. D. They are restored and improve resistance to infection. Q4. What can be inferred about the long-term effects of quitting smoking? A. Quitting smoking has no impact on coronary heart disease. B. The body gradually regains its ability to repair DNA. C. Lung cancer risk remains unchanged after quitting smoking. D. The benefits of quitting smoking are limited to younger smokers. Q5. What is the main purpose of the text? A. To highlight the dangers of smoking and benefits of quitting. B. To explain the chemical composition of cigarettes. C. To discuss the psychological challenges of quitting smoking. D. To analyze the global impact of smoking-related diseases. Part II. TRANSCRIPTHow do cigarettes affect the body?Cigarettes aren’t good for us. That’s hardly news — we’ve known about the dangers of smoking for decades. But how exactly do cigarettes harm us? Let’s look at what happens as their ingredients make their way through our bodies, and how we benefit physically when we finally give up smoking.With each inhalation, smoke brings its more than 5,000 chemical substances into contact with the body’s tissues. From the start, tar, a black, resinous material, begins to coat the teeth and gums, damaging tooth enamel, and eventually causing decay. Over time, smoke also damages nerve-endings in the nose, causing loss of smell.Inside the airways and lungs, smoke increases the likelihood of infections, as well as chronic diseases like bronchitis and emphysema. It does this by damaging the cilia, tiny hairlike structures whose job it is to keep the airways clean. It then fills the alveoli, tiny air sacs that enable the exchange of oxygen and carbon dioxide between the lungs and blood. A toxic gas called carbon monoxide crosses that membrane into the blood, binding to hemoglobin and displacing the oxygen it would usually have transported around the body. That’s one of the reasons smoking can lead to oxygen deprivation and shortness of breath.bronchitis n. 支气管炎 emphysema n. 肺气肿 alveoli n. 肺泡 sac n. 囊，气囊 membrane n. 膜 hemoglobin n. 血红蛋白 (Q1) Within about 10 seconds, the bloodstream carries a stimulant called nicotine to the brain, triggering the release of dopamine and other neurotransmitters including endorphins that create the pleasurable sensations which make smoking highly addictive. Nicotine and other chemicals from the cigarette simultaneously cause constriction of blood vessels and damage their delicate endothelial lining, restricting blood flow. These vascular effects lead to thickening of blood vessel walls and enhance blood platelet stickiness, increasing the likelihood that clots will form and trigger heart attacks and strokes.dopamine n. 多巴胺 neurotransmitter n. 神经递质 endorphin n. 内啡肽 endothelial adj. 内皮的 lining n. 内衬，内膜 Many of the chemicals inside cigarettes can trigger dangerous mutations in the body’s DNA that make cancers form. Additionally, ingredients like arsenic and nickel may disrupt the process of DNA repair, thus compromising the body’s ability to fight many cancers. In fact, about one of every three cancer deaths in the United States is caused by smoking.And it’s not just lung cancer. Smoking can cause cancer in multiple tissues and organs, as well as damaged eyesight and weakened bones. It makes it harder for women to get pregnant. And in men, it can cause erectile dysfunction.dysfunction n. 功能障碍 But for those who quit smoking, there’s a huge positive upside with almost immediate and long-lasting physical benefits.Just 20 minutes after a smoker’s final cigarette, their heart rate and blood pressure begin to return to normal. (Q2) After 12 hours, carbon monoxide levels stabilize, increasing the blood’s oxygen-carrying capacity. A day after ceasing, heart attack risk begins to decrease as blood pressure and heart rates normalize. After two days, the nerve endings responsible for smell and taste start to recover.Lungs become healthier after about one month, with less coughing and shortness of breath. (Q3) The delicate hair-like cilia in the airways and lungs start recovering within weeks, and are restored after 9 months, improving resistance to infection.cilia n. 纤毛 By the one-year anniversary of quitting, heart disease risk plummets to half as blood vessel function improves. Five years in, the chance of a clot forming dramatically declines, and the risk of stroke continues to reduce. (Q4) After ten years, the chances of developing fatal lung cancer go down by 50%, probably because the body’s ability to repair DNA is once again restored. Fifteen years in, the likelihood of developing coronary heart disease is essentially the same as that of a non-smoker.plummet v. 暴跌，骤降 coronary adj. 冠状的，冠状动脉的 There’s no point pretending this is all easy to achieve. Quitting can lead to anxiety and depression, resulting from nicotine withdrawal. But fortunately, such effects are usually temporary. And quitting is getting easier, thanks to a growing arsenal of tools. Nicotine replacement therapy through gum, skin patches, lozenges, and sprays may help wean smokers off cigarettes. They work by stimulating nicotine receptors in the brain and thus preventing withdrawal symptoms, without the addition of other harmful chemicals. Counselling and support groups, cognitive behavioral therapy, and moderate intensity exercise also help smokers stay cigarette-free.lozenge n. 含片，润喉片 wean v. 使断奶，使戒掉 That’s good news, since quitting puts you and your body on the path back to health.Part III. KEYQ1. C.【解析】细节题。根据“Within about 10 seconds, the bloodstream carries a stimulant called nicotine to the brain, triggering the release of dopamine and other neurotransmitters.”，可知血液将一种叫尼古丁的刺激物输送到大脑，触发多巴胺和其他神经递质的释放，使人吸烟成瘾。正确答案为C。 Q2. B.【解析】细节题。根据“After 12 hours, carbon monoxide levels stabilize, increasing the blood’s oxygen-carrying capacity.”，可知在戒烟后12小时，血液中的一氧化碳水平稳定下来，增加了血液携带氧气的能力，是戒烟后即时身体益处。正确答案为B。 Q3. D.【解析】细节题。根据“The delicate hair-like cilia in the airways and lungs start recovering within weeks, and are restored after 9 months, improving resistance to infection.”，可知呼吸道和肺部的纤毛在几周内开始恢复，并在9个月后恢复，提高了对感染的抵抗力。正确答案为D。 Q4. B.【解析】推理题。根据“After ten years, the chances of developing fatal lung cancer go down by 50%, probably because the body’s ability to repair DNA is once again restored.”，可知在戒烟十年后，患致命肺癌的几率下降了50%，可能是因为身体修复DNA的能力再次恢复。从中可以推断，戒烟后身体会逐渐恢复修复DNA的能力。正确答案为B。 Q5. A.【解析】主旨题。文章主要讨论了吸烟对身体的危害以及戒烟带来的健康益处处。正确答案为A。 （本文图片来源于摄图网，版权归摄图网所有)

新闻听力 | 疫苗：科学与恐慌之争

Vaccines: Science vs. Scare疫苗：科学与恐慌之争常速 | 五级（难）| 784词 | 5min22s刘立军供稿Part I. QUESTIONSListen to the interview and choose the best answer to each question you hear.Q1. What is the only disease that humanity has eradicated? A. Polio. B. Smallpox. C. Measles. D. Malaria. Q2. What does Dr. Kate O’Brien suggest about the concept of “natural immunity”? A. It is more effective than vaccination. B. It is a safer way to develop immunity. C. It involves the immune system responding to germs. D. It is recommended for children by most scientists. Q3. What can be inferred about the immune system from the discussion? A. It is constantly exposed to microbes. B. It is overwhelmed by multiple vaccines. C. It cannot mature without vaccination. D. It is weaker in children than in adults. Q4. What is the main purpose of timing the vaccination schedule? A. To ensure vaccines are given at the lowest cost. B. To align with WHO global recommendations. C. To provide protection when children are most at risk. D. To avoid interference between different vaccines. Q5. What is the main idea of the passage? A. To introduce the global smallpox eradication campaign and its achievements.B. To answer parents’ common worries and misunderstandings about vaccination.C. To explain the complete standards of WHO’s official vaccine schedule.D. To compare natural immunity and vaccine immunity in detail.Part II. TRANSCRIPTVaccines: Science vs. ScareVGS: We’re standing here in front of the statue commemorating the smallpox eradication campaign. (Q1) Smallpox being the only disease that the world, humanity, has eradicated. This WHO-led campaign was the first mass vaccination campaign that brought together countries, experts and communities. Today, we have 30 vaccines that can prevent many many diseases. And 154 million lives have been saved, in the last 50 years, by just 14 of those vaccines. So if you’re a new parent, you may have questions about vaccines. We have Doctor Kate O'Brien here with us to answer your questions. Kate, let’s start with — parents may have heard what if we let our child get sick and develop immunity rather than vaccinate them? What is your advice regarding that?smallpox n. 天花 vaccinate v. 接种疫苗 KOB: The first thing I want to say is that the vaccines that have been developed that are in our program, are vaccines against serious diseases. Sometimes we hear the term natural immunity. And I really want to address this question. (Q2) Some people think that getting infected is somehow more natural than it is to develop your immunity from a vaccination. And I really want to disavow this. It’s the immune system in either circumstance is responding to either a germ or the vaccine itself. What’s most important is that exposing children to infections and risking the consequences of serious disease, and in the worst circumstances, death, is not what any parent would want to do.disavow v. 否认，拒绝承认 VGS: Another question that young parents may have is if you give a child many vaccines at the same time, you might overwhelm their immune system. What would you say to that?KOB: (Q3) Children are exposed to, in fact, millions of different microbes in the natural environment around us, in their foods, in the environment, by touching things, in their own bodies. We all have, in fact, more microbes in our body than we do human cells. This is an important way that children’s immune systems develop. The issue is, how to allow children to develop immunity against those germs that are consequential, that are serious, that cause disease. So the point around the vaccines is, children’s immune systems are more than able to respond to multiple vaccines, given at the same time, and multiple doses that are given over the course of their lifetime. Although we perceive that they’re being given “a lot of vaccines” in fact, on a daily basis, children are being exposed and sampling that outside world of those microbes all the time. The immune system is an incredibly powerful system. It’s amazing the way that it matures and identifies which is friend and which is foe in the environment. And vaccines are the safest way to actually derive protection for children, adolescents and adults against the consequential germs.consequential adj. 重要的，意义重大的 VGS: Can parents maybe stagger the schedule? Give a little space? Would that still have the same impact that you are seeking in protecting the child?KOB: Yeah. So this seems like a common sense, logical thing to do. We have studies that tell us in what sequence the vaccines should be given, how many doses should be given and how far apart they should be. Now, when you mess around with that schedule, there are consequences of doing that. First, it means that children may miss the doses that they should get. Second, it means that they may not get the vaccines at the time when they most need them. (Q4) We time the schedule so that the protection is developed before the period of time when children are most at risk of the particular disease that the vaccine is protecting against. And third, there are some vaccines that need to be timed relative to other vaccines that are in the schedule. They don’t work as well if they’re timed incorrectly. So that’s the reason why we have pediatricians, scientists, epidemiologists who make the recommendations within each country for what the schedule should be.VGS: So WHO makes a recommendation, right? But who is deciding on what vaccinations a citizen receives?KOB: Countries are the ones who decide on their schedule. What WHO does is, because we’re a global recommending body, we pull together experts from around the world. We ask them to look at all of the evidence that is available and we provide recommendations to countries. They can rely on the aggregated evidence that we’ve put together, so they can also deliberate on what makes most sense for their particular circumstance.VGS: Thank you Kate. I have additional questions. I’m sure our viewers have additional questions. So we will take this in part two where we will answer some of your questions on vaccines. Until next time then, stay safe, stay healthy and stick with science.Part III. KEYQ1. B.【解析】细节题。根据“Smallpox being the only disease that the world, humanity, has eradicated.”， 此句明确指出天花是人类唯一消灭的疾病，因此正确答案为B。 Q2. C.【解析】细节题。根据“Some people think that getting infected is somehow more natural than it is to develop your immunity from a vaccination… It’s the immune system in either circumstance is responding to either a germ or the vaccine itself.”，该句说明无论是自然感染还是接种疫苗，免疫系统都会对外来病菌产生反应，因此正确答案为C。 Q3. A.【解析】推理题。根据“Children are exposed to, in fact, millions of different microbes in the natural environment around us, in their foods, in the environment, by touching things, in their own bodies.”，此处说明孩子在日常环境、食物、身体中时刻接触数百万微生物，免疫系统长期接触各类细菌，因此可以推断正确答案为A。 Q4. C.【解析】细节题。根据“We time the schedule so that the protection is developed before the period of time when children are most at risk of the particular disease that the vaccine is protecting against”，该句明确指出安排疫苗接种时间是为了在儿童高危阶段前建立防护，因此正确答案为C。 Q5. B.【解析】主旨题。文章主要围绕疫苗对儿童的重要性以及父母对疫苗的常见顾虑展开，专家逐一破除误区、解答疑惑，因此正确答案为B。 （本文图片来源于摄图网，版权归摄图网所有)

新闻听力 | 疫苗安全真相

The truth about vaccine safety疫苗安全真相常速 | 五级（中等）| 856词 | 5min41s刘立军供稿Part I. QUESTIONSListen to the interview and choose the best answer to each question you hear.Q1. What is the main function of antigens in vaccines?A. To enhance the immune system’s response. B. To ensure the vaccine remains effective after opening. C. To preserve the vaccine during transport. D. To help the body recognize foreign germs. Q2. What is the main purpose of stabilizers in vaccines?A. To ensure vaccines remain effective during storage and transport. B. To boost the immune system’s response to germs. C. To allow vaccines to be administered in multiple doses. D. To enhance the body’s recognition of foreign invaders. Q3. What does the Global Advisory Committee on Vaccine Safety do?A. It develops new vaccines for global use. B. It monitors vaccine safety throughout their lifetime. C. It ensures vaccines meet all clinical trial standards. D. It issues reports on vaccine development progress. Q4. What can be inferred about the vaccine safety monitoring system?A. It relies solely on clinical trial data for safety evaluation. B. It prevents people from reporting unrelated issues. C. It identifies patterns from millions of submitted reports. D. It stops monitoring once vaccines are approved. Part II. TRANSCRIPTThe truth about vaccine safetyVGS: We are talking about vaccine today. This is part two of the vaccine series of Science in 5. In the first part, we spoke about some concerns that parents may have. (Q1) And in this video we are going to talk to our expert, Dr Kate O’Brien, about the ingredients of the vaccine. How do we make sure that vaccines are safe? Let’s start with the ingredients of the vaccine. There’s a lot of information and even misinformation out there. So please unpack this for us.KOB: So I want to just go through a couple of them because they have, you know, words and names that are pretty unfamiliar in our kind of day to day lives. And I think for a lot of people it can be concerning. For some it might sound a bit scary in some way. Many of the ingredients are actually components that we have in our environment, or in our foods. Not all the components of vaccines are foreign to our bodies or our exposure. So some of the ingredients include antigens. (Q2) Antigens are the part of a germ that is the actual part we want the body to develop its immunity to. It helps the immune system to actually recognize that foreign invader, that foreign germ that’s going to potentially cause disease. Second, are adjuvants. And adjuvants are the part of the vaccine that help boost the immune system. Not all vaccines will result in an adequate immune response without an adjuvant. The third part that’s added to a vaccine are maybe we can call them stabilizers. (Q3) And these are things that make sure that the vaccine is safe during transport and during all of the moving of the vaccine around. We also have, components of the vaccine that allow for some vaccines to be used after the vaccine vial is opened. If that’s made with multiple doses in a vial, it needs to be safe to keep that vaccine for multiple days in the refrigerator so that the next child who comes in can receive an additional dose in the vaccine.adjuvant n. 佐剂，助剂 vial n. 小瓶，药瓶 VGS: So let’s talk about the safety of the vaccine. That’s a concern a lot of parents may have. There is certainly a lot of information and misinformation about it outside. Talk to us about how we ensure that vaccines are safe. What is that process that vaccines are put through before they come to market?KOB: The very first thing that happens is that when a vaccine is being developed in the clinical trials, safety is monitored extremely carefully on a day to day basis, among those who have received the vaccine. There are phone calls made, logs filled out by parents about exactly what’s happening to this child. In order for a vaccine to go from a clinical trial to actually being an approved vaccine all of that safety information is rigorously evaluated, and it is assessed by experts who determine whether or not it needs safety standards. After a vaccine has been approved by a health authority the safety monitoring does not stop. In fact, safety monitoring goes out for the whole lifetime of use of a vaccine. It never actually stops. So health authorities are monitoring whether any reports are being given about potential problems with a vaccine. (Q4) Now at WHO, we have a safety committee. It’s an external committee of experts. And they get together and they review the reports that are submitted to the Global Monitoring Center. This is called the Global Advisory Committee on Vaccine Safety. And if a new safety issue comes up, we will issue a report around that safety issue.rigorously adv. 严厉地；严密地 VGS: So let’s talk about it when, there are concerns about the safety or there are concerns about a vaccine. What happens next?KOB: So what’s really important for people to understand is how this system works. It doesn’t mean anything to actually be telling the world how many reports came in, because you could submit a report about something that has absolutely nothing to do with the vaccine. That’s why the system is completely open, we don’t want to put any barriers up to people being able to report. What’s done with all of those reports is a careful review of them, especially in relation to which vaccines the report says were received and to see if there are any patterns that start to emerge in the reports. (Q5) If there starts to be a signal that comes up from those many, many, in fact, millions of reports that are sent in, we look into that signal specifically with the kinds of studies that will determine, is this something that is actually related to the vaccine or not related to the vaccine?VGS: Thank you Kate for explaining that. Those were some of the questions that we knew people had about vaccines. If you have more questions, put that on our timelines and tell us if you want us to continue explaining, clarifying any of your concerns about vaccines. Until next time then, stay safe, stay healthy and stick with science.Part III. KEYQ1. D.【解析】细节题。根据“Antigens are the part of a germ that is the actual part we want the body to develop its immunity to. It helps the immune system to actually recognize that foreign invader, that foreign germ that’s going to potentially cause disease.”，可知抗原的功能是帮助免疫系统识别外来病原体，因此正确答案是D。 Q2. A.【解析】细节题。根据“And these are things that make sure that the vaccine is safe during transport and during all of the moving of the vaccine around.”，可知稳定剂的主要功能是确保疫苗在运输和移动过程中保持安全有效。因此正确答案是A。 Q3. B.【解析】细节题。根据“And they get together and they review the reports that are submitted to the Global Monitoring Center. This is called the Global Advisory Committee on Vaccine Safety. And if a new safety issue comes up, we will issue a report around that safety issue.”，可知世卫组织的全球疫苗安全咨询委员会负责监控疫苗的安全性，并在发现新的安全问题时发布相关报告，也就是说该委员会的职责是全程监控疫苗的安全性，因此正确答案是B。 Q4. C.【解析】推理题。根据“If there starts to be a signal that comes up from those many, many, in fact, millions of reports that are sent in, we look into that signal specifically with the kinds of studies that will determine, is this something that is actually related to the vaccine or not related to the vaccine.”，可知如果从那些实际上提交的数百万份报告中开始出现一个信号，监控系统会专门通过研究来分析该信号，以确定它是否与疫苗相关。这表明监控系统通过分析大量报告来识别潜在问题，因此正确答案是C。 （本文图片来源于摄图网，版权归摄图网所有)

第12届教学大赛英语专业组二等奖赵雪宇授课

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