图 4-9 中使用的机械式继电器, 可以用电子开关来代替.The mechanical relays , which have been assumed in Fig . 4 - 9 , can be replaced by electronic switches.用继电器操作的一种可视信号或音响信号装置, 用以指示有关电路的情况.A visual or audible signaling device , operated by re...
I had stacked my shirts and underclothes in two empty drawers.我把衬衫和内衣塞进两个抽屉.Don’t tumble your underclothes.不要乱扔内衣。They had given him new underclothes and a clean suit of overalls.他们给他换了新内衣和一套干净的工作服.Don't tumble your...