The wrong area of zero potential selection was clarified after discussing several special zera potential , and the limited condition of select zero potential was given , and the using range of perfect model was pointed out .
通过对几个特例电势零点的讨论，澄清了电势零点选择的误区，给出电势零点选择的限制条件，并指出了理想模型的使用范围。
zera