Yet, people began to understand how electricity works only a little more than two centuries ago.

然而，人们只是在两个世纪前一点才开始了解电的使用原理。

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Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years.

人们只是在两个世纪前一点才开始了解电的使用原理，自然界却显然在这方面经历 过了数百万年。

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Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for millions of years.

两个世纪前人们对于电产生原理开始有了了解，而大自然在这方面经历了数百万年。

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Your computer works on wires and electricity but your brain uses tissue and tissue is extremely slow.

你的计算机依靠电线与电流而得以运行,但你的大脑应用的则是组织,而组织的反应则是相当缓慢的

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They were exploring things like what affects how grass grows, how electricity works, and why bread gets moldy.

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You'll want a cellphone charger that works without electricity, such as one used in a car.

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It works by using electricity generated from a nuclear reaction to accelerate charged particles out of the back of the spacecraft.

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