跟读练习: Why is it Hot Underground? - 通过YouTube学习英语口语
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Way back in the Middle Ages,
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Way back in the Middle Ages,
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miners began to notice that the deeper they dug into the Earth,
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the toastier it got.
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Who knows what they made of the heat,
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but the physicist Lord Kelvin,
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of temperature fame, naturally, had a theory.
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Earth started off hot, and has been cooling down ever since,
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like a baked potato pulled from the oven.
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What's more, Kelvin was confident this idea would allow him to calculate the age of our potato—I mean, planet.
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Imagine pulling two recently baked potatoes out of a freezer,
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one that's been in there for just a minute,
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the other for half an hour.
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The minute-old one would still feel like a hot potato,
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while the half-hour frozen spud would have cooled well below the skin.
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You'd have to poke all the way to the center to feel its residual warmth. And
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so in principle,
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you can tell how long ago a potato was cooked just by feeling how warm it is right beneath its surface.
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Which is exactly what Kelvin did,
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except with the Earth and scientific rigor.
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He took temperature measurements from the mines,
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put them into his calculations,
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and he got 20 million years.
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Which is, of course, very, very wrong.
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Somehow, the hot temperatures just under Earth's skin made it seem to Kelvin
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that our planet was pretty much fresh out of its cosmic oven,
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when we now know that it's 4,500 million years old.
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Calvin's error is usually attributed to the fact that he didn't know about radioactivity,
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which creates a ton of heat in Earth's core and helps keep the planet warm.
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But heat from radioactive decay moves so slowly through solid rock that taking radioactivity into account only improves Calvin's estimate by,
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well, pretty much nothing.
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Calvin's real oversight was in thinking of the Earth like a baked potato,
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a solid lump through which heat slowly diffuses.
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Earth's mantle, the thick layer between the crust and the core,
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is mostly solid, but it isn't rigid.
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In fact, the rock closest to the molten outer regions of the core gets so hot that it becomes slightly more pliable,
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like warmed candle wax.
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And like the hot air above a candle,
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the warm rock rises in convection currents over millions of years,
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spreading heat more evenly throughout the planet.
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This stirring carries tremendous amounts of heat from the core to the crust,
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fueling volcanoes, maybe helping to drive plate tectonics,
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and heating mine shafts to temperatures that make Earth seem like it's fresh out of the cosmic oven.
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Even though it's not.
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loud too.
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背景与概述
在中世纪时期，矿工们逐渐注意到，他们挖掘得越深，地面的温度就越高。虽然当时的人们对这种热量有不同的理解，但物理学家开尔文勋爵提出了一个理论：地球最初是热的，但随着时间的推移逐渐冷却，就像刚从烤箱里取出的土豆。而开尔文对这个理论的渴望，不仅希望说明地球的年纪，也试图通过测量地下温度来实现。这段探讨地球内部热量来源的旅程，不仅是一段科学的历程，同时也是理解英语表达能力的契机。
日常交流的五个短语
- “温度越来越高” - 通过观察环境变化来加强描述能力。
- “坚固但不灵活” - 理解并表达物体的特性。
- “热气流上升” - 学习描述科学现象，与日常生活关联。
- “时间的推移” - 使用表达涉及时间的词汇加深描述的深度。
- “地下深处的热量” - 增强对特定主题的表达能力，帮助进行更深入的交流。
逐步影子跟读指南
对于希望提高英语口语与听力的学习者，影子跟读是一种有效的方法。您可以采取以下步骤来充分利用视频内容：
- 选择合适的视频：找一个相关的科学或文化主题的英语视频，例如关于地球热源的分析。
- 初步听力理解：观看视频时，尽量理解大意，不必过于关注每个单词的意思。
- 播放与暂停：使用影子跟读练习的过程中，慢慢播放视频。每听到一个句子，就暂停并尝试模仿。
- 重复练习：不断重复这一过程，直到能够自如地跟上说话者的节奏，同时注意语音语调。
- 录音对比：自己录制跟读的声音，并与原视频进行比较，找出需要改进的地方，特别是在发音和语调上。
通过这种方式，不但能增加对科学知识的理解，还能提升自己的英语口语能力，运用这个英语影子跟读的技巧，您将体验到更有效的英语口语练习，从而更深入地理解和掌握英语！同时，建议使用看YouTube学英语的方式，开启您的英语学习之旅！
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。