switch
US /swɪtʃ/
UK /swɪtʃ/

1.
2.
转变, 转换
a sudden or complete change, especially of one thing for another
:
•
There was a sudden switch in the weather.
天气突然转变。
•
The company made a switch to renewable energy.
公司转向了可再生能源。
1.
2.
打开, 关闭
to turn an electrical device on or off
:
•
Please switch off the lights when you leave.
离开时请关掉灯。
•
He switched on the radio to listen to the news.
他打开收音机听新闻。