电流滞后于电压.The current lags behind the voltage.如果输入的电压是+3伏, 那么输出的电压便是-6伏.If the input voltage is plus three , it comes out as minus six.我们用以表示电压和电流的单位分别为伏特和安培。The units in which we show voltage and current are volt and ampe...
学生参加重考的次数将受到限制。Limits will be placed on the number of exam retakes students can sit.他坚持要求老师重考.He persisted in asking his teacher to retake the test....