switch on [ˌswitʃ'ɔn]

以下由轻松背单词网站提供

打开（灯、收音机等）

The policeman kicked the switch on,and light flooded the room.警察突然打开开关，房间里泛起一片灯光。
The video is programmed to switch on at ten o'clock.电视机设定在10点钟自动打开。