He switched the conversation from one subject to another.

We'd take the train into the city center, then switch to the tram.

② 交换；调换 to exchange one thing for another：

We asked them if they would switch places with us.

switch off 关上 (电灯、电视等) [非正式用语] 不听；不理睬

Please switch off the TV when you go to bed.

Thankfully, I've learned to switch off and let it over my head.

switch on 打开 (电灯、电视等)近 turn on

I hear that song whenever I switch on the radio.

switch over 改变；转换：

We've switched over to telephone banking.