light switch:电灯开关;用于接通或断开电路,从而控制灯的亮灭。(也可泛指“灯的开关装置/按钮”)
/ˈlaɪt ˌswɪtʃ/
Please turn off the light switch when you leave.
离开时请把电灯开关关掉。
In the darkness, she felt along the wall until her fingers found the light switch, and the room flared into view.
在黑暗中,她沿着墙摸索,直到手指碰到电灯开关,房间一下子亮了起来。
由 light(灯光) + switch(开关) 构成的复合名词。switch 原指“转换、切换”,后来引申为“(电路)开关”,与 light 组合后即指专门控制灯的开关。