He invented the phonograph, the motion picture, and the electric light bulb.

他发明了留声机、动态影片以及电灯泡。

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When we talk of electric current, we mean electrons in motion.

当我们谈到电流时，我们指的是运动的电子。

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When we talk of electric current, we mean electrons in motion.

当我们谈到电流时，我们指的是运动的电子。

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