跟读练习: Four ways to understand the Earth's age - Joshua M. Sneideman - 通过YouTube学习英语口语
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How old is the Earth?
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How old is the Earth?
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Well, by counting the number of isotopes in a sample of rock that's undergone radioactive decay, geologists have estimated the Earth's birthday, when it first formed from a solar nebula, to be 4.6 billion years ago.
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But just how long is that really?
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Here's some analogies that might help you understand.
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For example, let's imagine the entire history of Earth until the present day as a single calendar year.
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On January 1st, the Earth begins to form.
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By March 3rd, there's the first evidence of single-celled bacteria.
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Life remains amazingly unicellular until November 11th when the first multicellular organisms, known as the Ediacaran fauna, come along.
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Shortly thereafter, on November 16th at 6:08 p.m.
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is the Cambrian Explosion of life, a major milestone, when all of the modern phyla started to appear.
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On December 10th at 1:26 p.m., the dinosaurs first evolve but are wiped out by an asteroid just two weeks later.
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On December 31st, the mighty Roman empire rises and falls in just under four seconds.
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And Columbus sets sail for what he thinks is India at three seconds to midnight.
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If you try to write the history of the Earth using just one page per year, your book would be 145 miles thick, more than half the distance to the international space station.
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The story of the 3.2 million year-old Australopithecine fossil known as Lucy would be found on the 144th mile, just over 500 feet from the end of the book.
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The United States of America's Declaration of Independence would be signed in the last half-inch.
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Or if we compared geologic time to a woman stretching her arms to a span of six feet, the simple act of filing her nails would wipe away all of recorded human history.
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Finally, let's imagine the history of the Earth as your life: from the moment you're born to your first day of high school.
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Your first word, first time sitting up, and first time walking would all take place while life on Earth was comprised of single-celled organisms.
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In fact, the first multicellular organism wouldn't evolve until you were 12 years old and starting 7th grade, right around the time your science teacher is telling the class how fossils are formed.
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The dinosaurs don't appear until three months into 8th grade and are soon wiped out right around spring break.
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Three days before 9th grade begins, when you realize summer is over and you need new school supplies, Lucy, the Australopithecine, is walking around Africa.
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As you finish breakfast and head outside to catch your bus 44 minutes before school, the Neanderthals are going extinct throughout Europe.
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The most recent glacial period ends as your bus drops you off 16 minutes before class.
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Columbus sets sail 50 seconds before class as you're still trying to find the right classroom.
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The Declaration of Independence is signed 28 seconds later as you look for an empty seat.
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And you were born 1.3 seconds before the bell rings.
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So, you see, the Earth is extremely, unbelievably old compared to us humans with a fossil record hiding incredible stories to tell us about the past and possibly the future as well.
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But in the short time we've been here, we've learned so much and will surely learn more over the next decades and centuries, near moments in geological time.
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背景与上下文
这段视频由乔舒亚·M·斯奈德曼（Joshua M. Sneideman）主讲，讨论了地球的年龄，以及如何通过对岩石样本中同位素的计算来估算。这种话题让我们了解到地球的历史是多么庞大和复杂，让我们在日常生活中能更好地理解时间的跨度。通过一系列的类比，斯奈德曼帮助观众将地球的历史以更易于理解的方式呈现，无论是通过日历的形式，还是与个人生活的对比，都为我们描绘了一个惊人的故事。
日常交流中最常用的五个短语
- How old is the Earth?（地球多大了？）
- By counting the number of isotopes...（通过计算同位素的数量……）
- Just how long is that really?（那到底有多长呢？）
- Imagine the entire history...（想象整个历史……）
- The story of the 3.2 million year-old Australopithecine...（320万年的南方古猿的故事……）
逐步跟读指导
要有效地提升您的英语口语能力，可以参考以下步骤：
- 观看视频：先轻松观看视频，了解内容大意，无需过于关注细节。
- 逐句跟读：使用shadow speak的技巧，暂停视频，模仿每一句的发音和语调。如果遇到困难的句子，可以多听几遍。
- 重现对话：尝试复述一些短语，例如“地球多大了？”在不同的语境中使用它们，以增强记忆。
- 记录反馈：录下你自己的声音，比较与视频中的发音。如果有条件，找学习伙伴共同练习，给予彼此反馈。
- 定期回顾：时常回看视频，重复跟读，加深印象和理解，逐渐提高口语能力。
通过这些方法，您不仅可以提升您的雅思口语练习能力，还能更好地掌握英语表达。记得在看YouTube学英语时，运用这些技能，让您的学习更加有效！
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。