跟讀練習: How to Find Area and Perimeter | Educational Rap for Math Curriculum - 通過影片學習英語口語
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50 句
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1
It's the year 2060 and you're colonizing Mars.
2
You're about to buy a plot of land, but you have a dog and you want to make sure he has enough space to run around.
3
You also want to build a fence so he can't escape.
4
So first you want to know how big the backyard is, and then you want to know how far it is around.
5
To figure this out, you have to find.
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Just add the sides together and then you'll be great.
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With the area, that's the space inside.
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For a rectangle, it's lengthened with a multiply and perimeter.
9
The distance around a shape.
10
Just add the sides together and then you'll be great.
11
Yeah, here I am on Mars, trying to find out the size of my backyard.
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Well, it's a rectangle, right?
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So what if we cut it into squares of the same size?
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That are one unit long by one unit wide.
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These are called square units.
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Add them all up.
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Surprise!
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You got 72 square units or feet cause that's the unit we're using.
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Well who has time to count squares?
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Blank times width is the quickest way to get there.
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Yeah, that's how you find the area.
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A nice little formula that'll take care of you.
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And I need to hurry cause my dog is starving.
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Let's find the area so I can feed Marvin.
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My yard is 9 feet long by 8 feet wide.
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I get the area when I multiply each side.
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9 times 8 is 72.
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But here's another way for you to think it through.
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Basically you take the rows, and figure how many square units fit inside of those.
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Yo, my backyard is wide, 8 feet, so that's 8 rows with 9 square units in each.
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So multiply the 8 rows by the 9 square units, you get 72, yup, you knew it.
32
Area, that's the space inside, for a rectangle it's lengthened with a multiplied and perimeter.
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The distance around a shape, just add the sides together and then you'll be great.
34
Now I've got my area for my yard on Mars, and there's plenty of room for Marvin to live large.
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But now I need a fence, cause I heard the animals on Mars could be intense.
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So I'll need the perimeter, the distance around my whole yard, how do you get it?
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You just add up the length of the sides.
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9 plus 8 plus 8 plus 9 is a perimeter of 34 feet, and oh yeah, that's regular units and not units squared.
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So let's take a look from another angle to get the perimeter of a square or rectangle.
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You add 2 widths plus 2 lengths.
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Here's a formula, don't forget to say thanks.
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2 times length plus 2 times width to get a square or rectangle's perimeter quick.
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So let's try it with my Martian backyard.
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Come on, get ready, y 'all.
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It's not that hard.
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Two times the length of 9 is 18.
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And two times the width of 8 is 16.
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And 16 plus 18 is 34.
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Now if I could stop Marvin from making a dirty floor.
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Seriously.
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本課的詞彙與口語要點
這節 B1 級別的口語課以影片“How to Find Area and Perimeter”為素材。 影片中反覆出現的詞有：unit, square, perimeter, plus, add。 這段影片共有 50 個句子、501 個單詞可供跟讀。 講話部分時長為 3:11。 說話人語速自然，每分鐘約 157 個詞，接近日常對話。 84% 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
影片中最難的 12 個單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| perimeter 名詞 | /pɪˈɹɪm.ɪ.tə/ | 周邊 /周邊 |
| width 名詞 | /ˈwɪtθ/ | 寬度 /寬度 |
| backyard 名詞 | /bækˈjɑːd/ | 後院 /後院 |
| formula 名詞 | /ˈfɔː.mjʊ.lə/ | 公式 |
| fence 名詞 | /fɛns/ | 籬笆 /籬笆, 柵欄 /柵欄 |
| angle 名詞 | /ˈæŋ.ɡəl/ | 角, 角度 |
| hurry 動詞 | /ˈhʌ.ɹi/ | 趕工 /趕工, 忙 |
| starve 動詞 | /stɑɹv/ | 餓死 /餓死 |
| multiply 動詞 | /ˈmʌltɪplaɪ/ | 增長 /增長 |
| rectangle 名詞 | /ˈrɛktæŋɡl̩/ | 長方形 /長方形, 矩形 |
| lengthen 動詞 | /ˈlɛŋθən/ | 加長 /加長 |
| colonize 動詞 | /ˈkɑlənaɪz/ | 拓殖, 殖民 |
影片中出現的短語動詞
| 單詞 | 釋義 |
|---|---|
| find out 動詞 | 找出, 查明 |
| run around 動詞 | 忙碌, 奔忙 |
影片中的語法
說話人最常用的結構，並附上影片中的原話：
| 結構 | 影片中的用法 |
|---|---|
| “will” 表將來 will + 動詞 — 決定、承諾或預測 | you'll be · that'll take · I'll need |
| 現在進行時 am/is/are + -ing — 此刻或近期正在發生的事 | you're colonizing · we're using · is starving |
| 義務：must / have to / need to 表示某事是必要的 | have to find · need to hurry |
需要注意的發音
說話人用了 11 次縮略和弱讀形式，例如 you'll, you're, can't。請按聽到的簡短形式來說。
- “th” 音: width /ˈwɪtθ/, lengthen /ˈlɛŋθən/
中文母語者容易讀錯的音：
- 詞尾子音 — 要讀清楚，後面不要加母音: width /ˈwɪtθ/, backyard /bækˈjɑːd/, fence /fɛns/, intense /ɪnˈtɛns/, blank /ˈblæŋk/
- /æ/ — 嘴張大，不要讀成 /e/: backyard /bækˈjɑːd/, angle /ˈæŋ.ɡəl/, blank /ˈblæŋk/, rectangle /ˈrɛktæŋɡl̩/
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。
- 先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
- 錄下自己的聲音並與原聲對比，特別注意 perimeter, width, backyard 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。