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雅思真題聽力場景精練 第75期:科技類講座 物理與工業(6)

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SUE: Hmm, yes, that’s not bad.

MIKE: OK, now for number three you need rock salt or copper sulphate.

SUE: Oh, I’m not sure about that!

MIKE: Well, just put down the rock salt then, um, apart from that you only need a jar of water Um, and basically you dissolve lots of salt into the water and watch the crystals form, so it basically teaches the kids about growing crystals.

SUE: I suppose it would be nice to grow something. Hmm, let’s move on and have a look at number four.

MIKE: OK, this one is called “Spinning colour wheel”. It looks like you get some cardboard and draw a circle on it, divide it into six equal segments and colour each one in using different colors, then you thread a piece of string through the middle.

SUE: So we’d need some string as well.

MIKE: Yes, sorry... um... and you spin the wheel around and if you can get it spinning fast enough, hopefully the colours all merge and show up as white.

SUE: Oh I didn’t know that. What’s the principle behind it?

MIKE: Well it’s pretty elementary physics, really. It teaches them about how white light or ordinary light is made up.

SUE: Hmm, well that doesn’t sound too bad. Now there’s only one more left in this book isn’t there? What does that one say?

MIKE: Um, well it’s another one where they’d get to make something.

SUE: Sounds very interesting.

MIKE: You need quite a lot of equipment actually——a hand drill, an old record, a pin or needle, some paper and a bolt.

SUE: Hmm, go on, what do they have to do?

MIKE: Well, they basically make a record player. The main idea is to teach them about recording sound, but hopefully they’d also see that you need motion and an amplifier to make the sound heard.

SUE: OK, well it does sound interesting. Shall we go through all of those again and decide if any of them are going to be suitable?

重點單詞   查看全部解釋    
sue [su:]

想一想再看

vt. 控告,起訴
vi. 請求,追求,起訴

 
cardboard ['kɑ:dbɔ:d]

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n. 厚紙板

聯想記憶
jar [dʒɑ:]

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n. 不和諧,刺耳聲,震動,震驚,廣口瓶
vi

聯想記憶
circle ['sə:kl]

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n. 圈子,圓周,循環
v. 環繞,盤旋,包圍

 
string [striŋ]

想一想再看

n. 線,一串,字串
vt. 串起,成串,收緊

 
principle ['prinsəpl]

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n. 原則,原理,主義,信念

 
elementary [.elə'mentəri]

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adj. 基本的,初級的,元素的

聯想記憶
bolt [bəult]

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n. 螺栓,插銷,門閂
v. 閂住,插銷,(突

 
needle ['ni:dl]

想一想再看

n. 針
vt. 用針縫,激怒,嘲弄

 
drill [dril]

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n. 鉆孔機,鉆子,反復操練,播種機
v. 鉆

 
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