跟讀練習: Power – Rate of Work - 通過影片學習英語口語
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43 句
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Ever walked up a flight of stairs and wondered why running up feels so much harder?
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Think about what it takes to get up stairs.
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With every step, your muscles lift your body against gravity.
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If you ran up instead, you'd still have to lift your weight through the same height.
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That's where power comes in.
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Power tells us how quickly work is done.
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To find average power, divide the work by the time it takes.
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Work is measured in years, time in seconds, and power in watts.
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So, if you see a power rating of one watt, that means one gear of energy is transferred every second.
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Let's put some numbers to that.
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Imagine a climb that takes 1 ,200 years of work against gravity.
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If you take 12 seconds, your average power is 100 watts.
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What if you do that same climb in 6 seconds?
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Now you're doing 200 years of work each second.
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Half the time, twice the power.
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Imagine taking a ride in a sports car.
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The driver presses the accelerator and you feel yourself pressed back into the seat as the car picks up seats.
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The car is gaining kinetic energy.
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How quickly can its engine supply energy?
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Take a 400 kilowatt engine.
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At full power, it can deliver 400 ,000 joules of mechanical energy every second.
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Now picture a standard halfback on an everyday drive.
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It can reach motorway speed, too.
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Suppose this engine is rated at 60 kW.
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At full power, that's 60 ,000 wheels every second.
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If the two cars have similar mass, they need roughly the same gain in kinetic energy to go from rest to motorway speed.
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With similar grip and losses, the more powerful car can get there seen.
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Now let's look at the world's fastest landowner, the Cheetah.
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Imagine how quickly it has to gather speed when it chases its head.
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In just a quick drive, its muscles give its body a big increase in kinetic energy.
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That's a burst of high power.
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Compare that with a hard -working husky.
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Picture it pulling a light sled along a snowy trail.
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Once the sled is gliding at a steady speed, is the husky still doing work?
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It is.
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The snow resists the sled's motion, so the husky has to keep pulling.
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Its talent is disdaining that effort over a long distance.
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Next time you head upstairs, Think about two questions.
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How much work does it take to lift you to the top?
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And how quickly do you do it?
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The first tells you about the energy changes.
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Put that together with the time taken and you have your average path.
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Thank you.
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本課的詞彙與口語要點
這節口語課以影片“Power – Rate of Work”為素材。 影片中反覆出現的詞有：energy, speed, quickly, husky, kinetic。 這段影片共有 43 個句子、431 個單詞可供跟讀。 講話部分時長為 3:26。 說話人語速平穩，每分鐘約 126 個詞，很適合跟讀。 83% 的單詞屬於英語最常用的 3,000 詞，其餘的詞建議在練習前先學一下。
影片中的重點詞彙
影片中 15 個值得學習的單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| watt 名詞 | /wɑt/ | 瓦特 |
| muscle 名詞 | /ˈmʌs.əl/ | 肌肉, 筋肉 |
| climb 動詞 | /ˈklaɪ̯m/ | 登 |
| rat 名詞 | /ɹæt/ | лочў, 鳥鼠 /鳥鼠 |
| stairs 名詞 | /ˈstɛɹz/ | 樓梯 /樓梯 |
| everyday 形容詞 | /ˈɛvɹiˌdeɪ/ | 日常的 |
| compare 動詞 | /kəmˈpɛɚ/ | 比, 比較 /比較 |
| trail 名詞 | /tɹeɪl/ | 足跡 /足跡, 蹤跡 /蹤跡 |
| chase 動詞 | /t͡ʃeɪs/ | 追逐, 追 |
| steady 形容詞 | /ˈstɪdi/ | 穩定 /穩定 |
| resist 動詞 | /ɹɪˈzɪst/ | 抵制, 抵抗 |
| burst 動詞 | /bɜːst/ | 爆裂, 破裂 |
| divide 動詞 | /dɪˈvaɪd/ | 分, 分裂 |
| grip 名詞 | /ˈɡɹɪp/ | 柄 |
| upstairs 副詞 | /ˌʌpˈstɛɹz/ | 樓上 /樓上 |
影片中出現的短語動詞
| 單詞 | 釋義 |
|---|---|
| get up 動詞 | 起床 |
| pick up 動詞 | 拾取, 撿 /撿 |
需要注意的發音
- 長單詞——注意重音位置: mechanical /məˈkænəkəl/, accelerator /əkˈsɛl.əˌɹeɪ.tɚ/
中文母語者容易讀錯的音：
- /v/ — 不要讀成 /w/，上齒輕觸下唇: gravity /ˈɡɹævɪti/, everyday /ˈɛvɹiˌdeɪ/, divide /dɪˈvaɪd/
- 詞尾子音 — 要讀清楚，後面不要加母音: watt /wɑt/, rat /ɹæt/, stairs /ˈstɛɹz/, chase /t͡ʃeɪs/, resist /ɹɪˈzɪst/
- /r/ 和 /l/ 的區別: trail /tɹeɪl/, roughly /ˈɹʌf.li/, accelerator /əkˈsɛl.əˌɹeɪ.tɚ/
如何用這段影片練習
- 先完整聽一遍影片，不要開口，記下不認識的單詞。
- 用正常速度逐句跟讀，每句重複到你的節奏與說話人一致為止。
- 錄下自己的聲音並與原聲對比，特別注意 watt, muscle, climb 這類單詞。
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。