throw a switch/handle/leverSWITCH ON OR OFFto make something start or stop working by moving a control 扳动开关/把手/控制杆〔使设备启动或停止〕 He threw a switch and the lights all went out. 他按了一下开关,所有的灯都熄灭了。
throw a switch/handle/lever• The image of Chantal vanished instantly as though some one had thrown a switch.• He threw a lever and the twin 1500-horsepower engines roared to life.
→ throw a switch/handle/lever at throw1(11)