跟读练习: Biology overview - 通过YouTube学习英语口语

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[Voiceover] I would like to welcome you to Biology at Khan Academy.
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[Voiceover] I would like to welcome you to Biology at Khan Academy.
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And biology, as you might know, is the study of life.
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And I can't really imagine anything more interesting than the study of life.
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And when I say "life," I'm not just talking about us, human beings.
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I'm talking about all animals.
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I'm talking about plants.
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I'm talking about bacteria.
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And it really is fascinating.
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How do we start off with inanimate molecules and atoms?
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You know, this right here is a molecule of DNA.
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How do we start with things like that, and we get the complexity of living things?
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And you might be saying, well, what makes something living?
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Well, living things convert energy from one form to another.
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They use that energy to grow.
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They use that energy to change.
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And I guess growth is a form of change.
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They use that energy to reproduce.
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And these are all, in and of themselves, fascinating questions.
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How do they do this?
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You know, we look around us.
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How do we, you know, eat a muffin?
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And how does that allow us to move around and think, and do all the things we do?
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Where did the energy from that muffin come from?
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How are we similar to a plant or an insect?
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And we are eerily or strangely similar to these things.
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We actually have a lot more in common with, you know, that tree outside your window, or that insect, that bee, that might be buzzing around, than you realize.
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Even with the bacteria that you can only even see at a microscopic level.
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In fact, we have so much bacteria as part of what makes us, us.
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So these are fascinating questions.
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How did life even emerge?
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And so over the course of what you see in Biology on Khan Academy, we're going to answer these fundamental, fascinating questions.
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We're going to think about things like energy and the role of energy in life.
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We're going to think about important molecules in biology.
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And perhaps most importantly, DNA and its role in reproduction and containing information.
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And we're going to study cells, which are the basic building block of life.
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And as we'll see, even though we view cells as these super, super small, small things, cells in and of themselves are incredibly complex.
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And if you compare them to an atomic scale, they're quite large.
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In fact, this entire blue background that I have there, that's the surface of an immune cell.
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And what you see here emerging from it, these little yellow things.
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These are HIV viruses, emerging from an immune cell.
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So even though you imagine cells as these very, very small microscopic things, this incredible complexity.
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Even viruses.
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Viruses are one of these fascinating things that kind of are right on the edge between life and nonlife.
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They definitely reproduce, and they definitely evolve.
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But they don't necessarily have a metabolism.
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We'll learn a lot more about that.
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They don't necessarily use energy and growth in the same way that we would associate with life.
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And then perhaps one of the biggest questions of all is how did life come about?
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And we will study that as we look at evolution and natural selection.
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So welcome to Khan Academy's Biology section.
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I think you're going to find it fascinating.
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You're going to realize that biology, in some way, is the most complex of the sciences.
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And in a lot of ways, the one that we understand the least.
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It's going to be built on top of chemistry, which in turn is built on top of physics, which in turn is built on top of mathematics.
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And biology is one of our Frankly, even in the last hundred years, we're just starting to scratch the surface of understanding it.
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But what's really exciting is where the field of biology is going.
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As we understand things at a deeper level, at a molecular level, we're going to start thinking about how can we even do things like engineer biology, or affect the world around us?
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It's going to raise all sorts of fascinating and deep and ethical questions.
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So, hopefully you enjoy this.
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Biology is one of the most, arguably, maybe the most fascinating subject of all.
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I don't want to offend the chemists and the physicists out there.
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I actually find those quite fascinating as well.
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But we're going to answer, or attempt to start to answer, some of the most fundamental questions of our existence.

本課程概述

在這一節課中，學習者將深入了解生物學的基本概念，包括生命的定義和生物的複雜性。我們將探討生命是如何從無生命分子和原子中產生的，生物如何以能量為基礎進行生長和繁殖，以及細胞在生命中的重要性。此外，將提及 DNA 在遺傳信息中的作用以及病毒的特性。這一課程不僅將提高您對生物學的理解，還將幫助您透過生物學的語言訓練提高您的英语口语能力。此課程非常適合希望提升英语口语练习和雅思口语练习的學習者。

關鍵詞彙與短語

  • 生命 (life)
  • 能量 (energy)
  • 生長 (growth)
  • 繁殖 (reproduce)
  • 細胞 (cell)
  • DNA (DNA)
  • 病毒 (virus)
  • 演化 (evolution)

練習技巧

在觀看這段生物學的視頻時，建議學習者使用 shadowing 技巧進行跟讀。首先，將視頻的語速調整為適合自己理解的節奏，能夠讓您更好地跟隨。當講者談到生物學的概念時，試著模仿他的語調和發音。這個練習不僅能提高您的英语发音，還有助於您理解更複雜的生物學術語。

學習者可以重複聆聽每一個段落，根據自己的理解進行學習和模仿，這樣可以加快您在生物領域的學習以及提高您的口語能力。試著用所學的生物名詞進行自我介紹，並且在社交場合中與他人討論生物學的話題，這將進一步幫助您在现实生活中運用英语。

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。

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