Many life processes involve alternating voltages and currents .

许多生命过程涉及到交变电压和交变电流。

High voltages in piezo systems and control units .

压电系统和控制单元中为高电压状态。

Below are the photos taken at various voltages .

下面是在不太难过电压下的照片。

The electronics and the motors can also operate from different voltages .

电子设备和电动机还可以在不同的电压下工作。

Without r1 , ic1a 's noninverting input could be damaged by large negative-going voltages .

没有r1，ic1a的同向输入可能会被大的反向电压损坏。