Almost every employee must moonlight in second jobs simply to subsist.只是为了维持生计，几乎每个职员都要偷偷地做兼职。Old people often subsist on very small incomes.老人往往靠十分微薄的收入艰难度日。subsist on wages靠工资过活I was very sorry to tell him that the lit...
Semiconductor switches actuate reed relays for signal circuits or power relays for other functions.在信号电路中,以半导体开关驱动舌簧继电器;在其它程序动作电路中,以半导体开关驱动功率继电器.Electromyogram ( EMG ) is employed to help determine the control signal use...