The electron volt is not a unit of potential difference.
电子伏特不是，就是一单位的电子伏特。
What is the unit of potential difference? Volt.
势能差的单位是什么，伏特。
A unit of potential equal to one thousandth of a volt.
电压单位等于千万分之一伏特。
Electric potential can be thought of as potential energy per unit charge.
电势可比作每单位电荷的位能。
Electric potential can be thought of as potential energy per unit charge.
电势可比作每单位电荷的位能。
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