跟讀練習: Why is hot air WAVY? (only for curious) - 通過影片學習英語口語
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32 句
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Do you remember when you are driving on the road
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and it's a sunny day and the air in the distance seems kind of wavy?
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Or when you are sitting at a campfire and the air right above the campfire is somehow blurred?
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I always questioned this as a kid, but now that I have all the knowledge that I need to explain it to myself, and I believe you do too, I never bothered to do so.
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And even though I'm not the smartest person of all, I tried to break it down into few simple terms to be able to explain it to you.
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Since the air is hotter, it has more heat.
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And heat is just a form of energy.
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And that energy actually transforms even into speed.
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So the molecules of the air, in the hotter air, are a lot faster.
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But because they are faster, they tend to push into each other a lot more.
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And because they push with faster speeds, they actually push a lot stronger.
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And because they push a lot stronger, they actually start to bump into each other into much bigger distances.
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And what this causes is a much lower density of the air because it's just a lot more spread out.
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So the density of the air only depends on how hot it is.
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And because the hotter air is actually getting created on the ground where the heat is coming from, the lowest layer of the air actually has the least amount of density.
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So what it automatically does is it starts exchanging with the layer that is above it because it has more density.
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So it exchange.
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And once it starts exchanging, you can see
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that what starts happening is this chain reaction of the air actually starting to form these lines
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that are going above and each other.
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But then if we don't see air, how are we seeing this change? something called refraction of light
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comes into play refraction is the process of bending light waves
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and all that determines how the light comes into our eyes is the substance
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that it comes through in this case either hot air
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or cold air if you can imagine these hot
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and cold layers of air actually exchanging constantly
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and the light passing through them it actually isn't going straight
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what it is doing is it's constantly bending through these layers
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so and so because the light that is delivered then to our eyes bent
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so many times before it came into our eyes our brain
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automatically perceives the coming thing as a bit of vibrating and so that's why it always seems a bit wavy.
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But if this is true, have you ever seen this happen with cold air?
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關於本課
在這一課中，您將學習到與熱空氣和光折射相關的有趣現象，提升您的英語口語能力。通過理解熱空氣如何影響視覺效果，您不僅能更好地掌握科學概念，還能在對話中更流利地使用相關詞彙。這一練習適合那些希望通過觀看影片進行“看YouTube學英語”的學習者，尤其是進行雅思口語練習的學生。
關鍵詞彙與短語
- 熱空氣 (hot air)
- 光折射 (refraction of light)
- 密度 (density)
- 分子 (molecule)
- 能量 (energy)
- 鏈反應 (chain reaction)
- 振動 (vibrate)
- 交替 (exchange)
練習建議
在進行與本影片相關的英語口語練習時，建議您採取“shadow speak”技巧，即“影子說話”方法。在您觀看影片時，可以嘗試跟隨講話者的語速和語調進行模仿。由於影片中講述的內容涉及熱空氣與光折射的概念，建議您注意講話者在解釋時的語氣與節奏，力求達到自然流利的效果。
尤其要記得，在進行雅思口語練習時，語調和停頓同樣重要。反覆傾聽並大聲朗讀，可以幫助您提高語音的準確性，從而增強您的自信心。嘗試多次重複，並記錄自己的發音，與原影片進行對比，找出需要改進的地方。
通過這樣的練習，您將能夠更加自如地在日常對話中運用相關詞彙和短語，進而提升整體的英語口語能力。這不僅限於理論，實踐才是提高語言能力的關鍵。如果在此過程中您遇到困難，不妨回放影片，再次體會發音的細節，幫助您更好地掌握和運用所學內容。
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。