I already introduced, as you see there length, time and mass and we call these the three fundamental quantities in physics.

我已经讲过，长度、时间、质量，它们被称为，三个基本物理量。

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The mass deposited on the electrode is directly proportional to the current and (the length of) time.

电极析出物质的质量，与电流的大小和通电时间成正比。

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