跟读练习: What would happen if you didn’t drink water? - Mia Nacamulli - 通过YouTube学习英语口语
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Water is virtually everywhere, from soil moisture and ice caps, to the cells inside our own bodies.
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38 句
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Water is virtually everywhere, from soil moisture and ice caps, to the cells inside our own bodies.
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Depending on factors like location, fat index, age, and sex, the average human is between 55-60% water.
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At birth, human babies are even wetter.
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Being 75% water, they are swimmingly similar to fish.
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But their water composition drops to 65% by their first birthday.
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So what role does water play in our bodies, and how much do we actually need to drink to stay healthy?
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The H20 in our bodies works to cushion and lubricate joints, regulate temperature, and to nourish the brain and spinal cord.
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Water isn't only in our blood.
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An adult's brain and heart are almost three quarters water.
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That's roughly equivalent to the amount of moisture in a banana.
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Lungs are more similar to an apple at 83%.
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And even seemingly dry human bones are 31% water.
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If we are essentially made of water, and surrounded by water, why do we still need to drink so much?
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Well, each day we lose two to three liters through our sweat, urine, and bowel movements, and even just from breathing.
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While these functions are essential to our survival, we need to compensate for the fluid loss.
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Maintaining a balanced water level is essential to avoid dehydration or over-hydration, both of which can have devastating effects on overall health.
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At first detection of low water levels, sensory receptors in the brain's hypothalamus signal the release of antidiuretic hormone.
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When it reached the kidneys, it creates aquaporins, special channels that enable blood to absorb and retain more water, leading to concentrated, dark urine.
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Increased dehydration can cause notable drops in energy, mood, skin moisture, and blood pressure, as well as signs of cognitive impairment.
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A dehydrated brain works harder to accomplish the same amount as a normal brain, and it even temporarily shrinks because of its lack of water.
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Over-hydration, or hyponatremia, is usually caused by overconsumption of water in a short amount of time.
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Athletes are often the victims of over-hydration because of complications in regulating water levels in extreme physical conditions.
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Whereas the dehydrated brain amps up the production of antidiuretic hormone, the over-hydrated brain slows, or even stops, releasing it into the blood.
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Sodium electrolytes in the body become diluted, causing cells to swell.
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In severe cases, the kidneys can't keep up with the resulting volumes of dilute urine.
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Water intoxication then occurs, possibly causing headache, vomiting, and, in rare instances, seizures or death.
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But that's a pretty extreme situation.
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On a normal, day-to-day basis, maintaining a well-hydrated system is easy to manage for those of us fortunate enough to have access to clean drinking water.
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For a long time, conventional wisdom said that we should drink eight glasses a day.
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That estimate has since been fine-tuned.
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Now, the consensus is that the amount of water we need to imbibe depends largely on our weight and environment.
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The recommended daily intake varies from between 2.5-3.7 liters of water for men, and about 2-2.7 liters for women, a range that is pushed up or down if we are healthy, active, old, or overheating.
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While water is the healthiest hydrator, other beverages, even those with caffeine like coffee or tea, replenish fluids as well.
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And water within food makes up about a fifth of our daily H20 intake.
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Fruits and vegetables like strawberries, cucumbers, and even broccoli are over 90% water, and can supplement liquid intake while providing valuable nutrients and fiber.
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Drinking well might also have various long-term benefits.
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Studies have shown that optimal hydration can lower the chance of stroke, help manage diabetes, and potentially reduce the risk of certain types of cancer.
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No matter what, getting the right amount of liquid makes a world of difference in how you'll feel, think, and function day to day.
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关于本课
欢迎来到本期的英语口语练习页面！本课将带您深入探索“水”在我们身体中的奥秘。通过学习TED-Ed视频《如果你不喝水会发生什么？》，您将了解水对生命的重要性、身体缺水或水过量的影响，以及如何保持健康的补水习惯。这不仅能帮助您积累与健康、生理学相关的英语词汇和短语，还能提升您在描述原因、结果以及给出建议时的语言表达能力，助您实现英语流利度的飞跃。
通过本课程，您将有机会：
- 学习和使用描述身体功能及健康状况的专业词汇。
- 掌握表达因果关系的句型结构。
- 练习清晰、准确地阐述科学概念和日常健康建议。
重要词汇和短语
- virtually everywhere (几乎无处不在): 表示某物普遍存在，非常常见。
- cushion and lubricate joints (缓冲和润滑关节): 描述水在关节保护中的具体作用。
- compensate for the fluid loss (弥补体液流失): 指通过补充水分来平衡身体流失的液体。
- cognitive impairment (认知障碍): 指思维、记忆、学习等认知能力下降。
- conventional wisdom (传统观念/普遍看法): 指人们普遍接受的常识或观点。
- fine-tuned (精细调整/微调): 表示对某个估计或方法进行了更精确的修正。
- optimal hydration (最佳水合状态): 指身体保持最佳水分平衡的状态。
- replenish fluids (补充体液): 与“compensate for the fluid loss”意思相近，强调重新注满身体所需的液体。
本视频练习技巧
为了最大化您的英语口语练习效果，特别是发音练习，我们建议您采用以下跟读技巧：
- 语速模仿： 视频讲解者的语速适中，发音清晰。在跟读时，请努力匹配他们的语速和节奏，尤其要注意句子内部的停顿和连读，这对提升英语流利度至关重要。
- 发音细节： 关注视频中涉及的生物学和医学词汇的发音，例如“hypothalamus”（下丘脑）、“antidiuretic hormone”（抗利尿激素）、“aquaporins”（水通道蛋白）和“hyponatremia”（低钠血症）。反复练习这些词，确保您的发音准确无误。
- 语调和重音： 讲解者在强调重要信息或解释复杂概念时，语调会有所变化。在跟读时，尝试模仿这种语调模式，这将使您的表达更自然、更具说服力，这在雅思口语等考试中也尤为重要。
- 理解与表达： 在跟读之前，先完整观看并理解视频内容。跟读时不仅要模仿声音，还要尝试理解每个词和句子的含义，思考如何用自己的语言复述这些信息。这将帮助您将词汇和句型内化为自己的表达工具。
- 重点句型练习： 视频中包含许多描述因果关系（如“if... then...”、“cause... lead to...”）和数据引用的句型。选择其中2-3个您认为有用的句型进行反复跟读和仿写，强化您的句式掌握能力。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。
如何在ShadowingEnglish上有效练习
- 选择您的视频： 挑选一段语音清晰、自然的YouTube视频。TED演讲，BBC新闻，电影片段，播客或雅思口语范例都很好。将URL粘贴到搜索栏中。从较短的视频（短于5分钟）以及您真正感兴趣的内容开始——兴趣是最重要的导师。
- 先听，理解上下文： 第一次听的时候，将速度保持在1倍速并仅仅倾听。还不要尝试重复。专注于理解其含义，收集新词汇，并注意讲话人如何强调单词，连读声音及使用停顿。
- 设置跟读模式：
- 等待模式：选择
+3s或+5s——在每句话播放完毕后，视频会自动暂停以便您有时间大声重复它。如果您想完全控制并在每次重复后由您自己点击下一步，请选择手动。 - 字幕同步：YouTube字幕有时会在音频前或后略微出现。使用
±100ms使它们完美对齐以助您准确跟读。
- 等待模式：选择
- 大声跟读（核心练习）： 这是真正发生改变的一步。当一个句子播放出来立刻——或在暂停期间——大声、清晰且自信地重复出来。千万不要只是张张嘴：要模仿说话者的准确节奏、重音、音高和连读。力求听上去就像说话者的影子，而不仅是逐字背诵。使用重复功能多次练习同一个句子，直到感觉自然为止。
- 提高难度： 当练习段落变得相对舒适后，就去挑战自我。将速度增加至 <code>1.25x</code> 或甚至 <code>1.5x</code> 以训练高速语言反射。或者将等待模式调整为 <code>关闭</code> 以进行连续跟读——这是最进阶同样收益最大的模式。持续的每日15–30分钟的练习将可以在几周内产生可见的效果。