シャドーイング練習: Can You Define Energy? - 動画で英語スピーキングを学ぶ
レッスンを作成中...
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Here's a question that sounds easy.
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What is energy?
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Go on, try it.
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Define it to a friend.
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You've said the word a thousand times.
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You've got energy after breakfast.
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A battery runs out of energy.
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The sun gives off energy.
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But if I asked you to point at energy, actually point at it, where would you point?
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You can't.
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And that's the strange part.
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Energy might be the most important idea in all of science, and nobody has ever seen it.
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Not once.
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Not with a microscope.
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Not with a telescope.
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Because energy isn't a thing.
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It's not stuff like water or air.
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You can't fill a jar with it.
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You can't put it on a scale and weigh it.
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Open a textbook and you'll find energy defined as the ability to do work or to make change.
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It doesn't tell you what energy is, it tells you what energy does.
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And that's the catch.
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We can't see energy, but we can see the changes it causes when it's converted from one form into another.
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Think about a campfire.
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There's a lot of air.
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Chemical potential energy is stored inside the wood, but a log just looks like a log.
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Then it burns, and that chemical energy converts into heat and light.
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You feel the warmth on your face.
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You see the glow.
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You're not seeing energy.
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You're seeing a conversion.
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A diver standing on a diving board may not appear to have energy energy, but their height gives them gravitational potential energy.
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The board stores elastic potential energy as it bends, then launches them upwards.
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As they fall, gravitational potential energy becomes kinetic energy.
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Energy transfers to the water, creating waves and sound.
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Every step of the way, you only notice the energy at the moment it changes form.
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Or look at a solar panel on a roof.
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Sunlight hits it, but nothing seems to happen.
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No noise, no moving parts.
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It just sits there.
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But inside the panel's photovoltaic cells, light energy is being converted into electrical energy.
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Now step inside the home and switch on a fan.
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Suddenly, the blades are spinning.
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That's electrical energy converting into kinetic energy.
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Light energy into electrical energy and then inside the house into many other forms.
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Kinetic energy in a fan, heat in a toaster, light and sound from a TV.
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So here's the sneaky bit.
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Scientists don't define energy by what it is, they define it by what it does.
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Textbooks say energy is the ability to make things happen, to move something, heat something, or light something up.
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That's true.
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But notice it describes the effects, not the thing itself.
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So that's why energy is so hard to define.
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We've never seen it, not once.
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We've only ever seen its footprints.
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このレッスンについて
「Can You Define Energy?」を使って、シャドーイングで英語を練習しましょう。
毎日15〜30分の練習で、IELTSスピーキングへの自信と実践的な英会話力が身につきます。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。