We know that charge is equal to the integral of current times the time. And he knows the current, he knows how much time and then he weighs this.

我们知道电量等于电流,对时间的积分，他知道电流，他也知道时间，然后他测量这个。

麻省理工公开课 - 固态化学导论课程节选

This is on the basis of the integral of the current times the time.

这是根据电流对,时间的积分。

麻省理工公开课 - 固态化学导论课程节选