And this drop in potential energy, divided by the test charge's magnitude, gives us the electric potential energy difference per unit charge, also known as the electric potential.

势能随着测试电荷量的减少给我们带来了差异 单次充电中的电势能，又称电势。

Finding the electric potential created by a point charge is like finding the difference in potential energy per unit charge, between the spot right next to the point charge and somewhere infinitely far away.

求点电荷产生的场类似于求势能差 一个电荷，在点电荷旁边的点和无限远的未知位置之间。