如图所示，将两个柠檬电池串联起来我们可以产生1.788伏特的电压。

The two lemon batteries above, combine to produce a voltage of 1.788 volts.

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每当父亲测量电压的时候，男孩就会自愿帮忙读出伏特数。

Every time when his father measured the voltage, the boy volunteered to help read how many volts it was.

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4个柠檬电池一起可以产生3.50伏特的电压。

Four lemon batteries create a voltage of 3.50 volts.

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And what if I took a unit charge and I multiplied it times unit voltage, one volt?

如果我取个元负荷,让它乘上个电压单位，一伏特？

麻省理工公开课 - 固态化学导论课程节选