跟读练习: Three ways the universe could end - Venus Keus - 通过YouTube学习英语口语
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We know about our universe’s past: the Big Bang theory predicts that all matter, time, and space began in an incredibly tiny, compact state about 14 billion years ago.
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38 句
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We know about our universe’s past: the Big Bang theory predicts that all matter, time, and space began in an incredibly tiny, compact state about 14 billion years ago.
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And we know about the present: scientists’ observations of the movement of galaxies tell us that the universe is expanding at an accelerated rate.
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But what about the future?
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Do we know how our universe is going to end?
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Cosmologists have three possible answers for this question, called the Big Freeze, the Big Rip and the Big Crunch.
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To understand these three scenarios, imagine two objects representing galaxies.
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A short, tight rubber band is holding them together— that’s the attractive force of gravity.
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Meanwhile, two hooks are pulling them apart— that’s the repulsive force expanding the universe.
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Copy this system over and over again, and you have something approximating the real universe.
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The outcome of the battle between these two opposing forces determines how the end of the universe will play out.
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The Big Freeze scenario is what happens if the force pulling the objects apart is just strong enough to stretch the rubber band until it loses its elasticity.
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The expansion wouldn’t be able to accelerate anymore, but the universe would keep getting bigger.
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Clusters of galaxies would separate.
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The objects within the galaxies– suns, planets, and solar systems would move away from each other, until galaxies dissolved into lonely objects floating separately in the vast space.
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The light they emit would be redshifted to long wavelengths with very low, faint energies, and the gas emanating from them would be too thin to create new stars.
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The universe would become darker and colder, approaching a frozen state also known as the Big Chill, or the Heat Death of the Universe.
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But what if the repulsive force is so strong that it stretches the rubber band past its elastic limit, and actually tears it?
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If the expansion of the universe continues to accelerate, it will eventually overcome not only the gravitational force – tearing apart galaxies and solar systems– but also the electromagnetic, weak, and strong nuclear forces which hold atoms and nuclei together.
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As a result, the matter that makes up stars breaks into tiny pieces.
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Even atoms and subatomic particles will be destroyed.
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That’s the Big Rip.
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What about the third scenario, where the rubber band wins out?
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That corresponds to a possible future in which the force of gravity brings the universe’s expansion to a halt— and then reverses it.
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Galaxies would start rushing towards each other, and as they clumped together their gravitational pull would get even stronger.
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Stars too would hurtle together and collide.
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Temperatures would rise as space would get tighter and tighter.
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The size of the universe would plummet until everything compressed into such a small space that even atoms and subatomic particles would have to crunch together.
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The result would be an incredibly dense, hot, compact universe — a lot like the state that preceded the Big Bang.
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This is the Big Crunch.
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Could this tiny point of matter explode in another Big Bang?
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Could the universe expand and contract over and over again, repeating its entire history?
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The theory describing such a universe is known as the Big Bounce.
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In fact, there’s no way to tell how many bounces could’ve already happened— or how many might happen in the future.
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Each bounce would wipe away any record of the universe’s previous history.
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Which one of those scenarios will be the real one?
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The answer depends on the exact shape of the universe, the amount of dark energy it holds, and changes in its expansion rate.
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As of now, our observations suggest that we’re heading for a Big Freeze.
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But the good news is that we’ve probably got about 10 to the 100th power years before the chill sets in — so don’t start stocking up on mittens just yet.
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为什么通过这个视频练习口语？
观看《宇宙可能结束的三种方式》这个视频，不仅可以让你对宇宙的未来有更深刻的了解，还能提供极好的口语练习机会。通过模仿视频中的表达和语调，你可以提高英语发音，增强自身的口语能力。练习时，可以尝试重复说出视频中的句子，这种方法被称为“shadow speak”（阴影发音），有助于提升语音流利度及自信心。在与同伴或语言学习小组中讨论视频的内容，你还可以学习如何表达复杂的科学概念，从而扩展你的词汇量。
语法与表达的语境
在这个视频中，演讲者采用了多种语法结构和表达方式，非常适合英语学习者学习：
- 条件句: “如果扩张的力量足够强…” 这种句型能够帮助你理解和使用假设语气。
- 进行时态: “宇宙正在加速扩张。” 使用进行时能够描述当前正在发生的动作。
- 被动语态: “这个问题被称为大冻结、大撕裂和大崩塌。” 这表达方式很常见，可以帮助你学习如何在描述现象时使用被动构句。
- 对比结构: “如果拉扯过于强烈和不足…” 通过对比，可以全面理解不同现象的特点。
常见的发音难点
在视频中，某些单词的发音可能会对学习者造成困扰。例如，"gravity"（重力）和 "accelerate"（加速）的发音需要特别注意。此外，视频里提到的词汇如 "universe"（宇宙）和 "cosmologists"（宇宙学家）对于非母语者来说，可能需要反复练习以确保准确性。通过练习这些发音，你可以有效提高英语发音，克服口音问题。
总之，利用视频中的内容练习口语，不仅丰富了你的文化知识，还有助于你的发音和语言表达能力提升。通过 shadowspeaks（阴影表达）的方法，增强语言运用能力，让你的英语水平更进一步。
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。