原声例句
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Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, iron, why is Mars red?
水银是液态金属，水银，行星，是肉眼能看到的运动最快的天体,火星，铁，为什么火星是红色的？
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Well, I think everybody's got red hair at the minute because Rihanna dyed her hair red.
我想现在很多女人染红发是因为蕾哈娜染成红发了。
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And then since we have my red laser pointer, we will also try with the red laser pointer, which is centered at wavelength of 700 nanometers.
然后因为我们有我的红色激光笔，我们也可以用它试一下，它的波长集中在700纳米处。
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$firstVoiceSent
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