Which switch do I press to turn it off?

我按哪个开关就能把它关了？

《牛津词典》

You don't need a light switch or a light bulb or an iPhone app to turn something on or off.

你不需要电灯开关、灯泡或苹果手机应用程序来打开或关闭某些东西。

youdao

Turn the light off as you go out.; Please switch off the lights when you leave.

出门时请随手关灯。

《新英汉大辞典》

Of course, to turn the on-off switch on is harder when somebody's in a coma.

当然要开启这个开关难度更大,当人陷入昏迷。

耶鲁公开课 - 死亡课程节选

Some residents in Dorset are calling on the county council to turn street lights back on at night time claiming the current switch-off is "dangerous".

BBC: Councillor Robert Gould, from Dorset County Council

Many authorities are trialing a switch-off of street lights at night, including Somerset and Wiltshire, but some have decided to turn them back on, including Milton Keynes, following a 30% rise in accidents and two deaths in unlit areas.

BBC: Councillor Robert Gould, from Dorset County Council