我不该把我的公文包和相机包留在那儿无人看管。I should not leave my briefcase and camera bag unguarded.公文包重重地落在桌上。The briefcase flopped onto the desk.设计精巧的小公文包a natty little briefcase...
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...
Newington threw his head back and cackled with laughter.纽因顿仰头大笑。The cruel boy threw stones at the frogs.那个残忍的男孩用石头投掷青蛙。She began studying medicine, but threw it up after seeing the first operation.她开始学医, 但见习了第一次手术后, 便放弃了...