An electric current can consist of charges that are positive, negative, or both.
电流中可能包含正电荷、负电荷，或两种电荷同时存在。
The positive development is that electric power may be restored to the plant in the coming hours, meaning pumps can be restarted - if they are still operational.
好事情是电力供给可能在接下来的几个小时之内恢复，也意味着水泵作业可以重新开始-前提是他们还能用的话。
Between these two tiny particles, the proton and the electron, there is a powerful attraction that is always present between negative and positive electric charges.
在质子和电子这两个微粒之间有一个很大的吸引力，而这个吸引力总是存在于正、负电荷之间。
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