switching voltage

例句：

1. 1. The power switch is locatedon the wall next to the socket.
   电源开关位于插座旁边的墙上。
2. 2. The circuitbreaker switches offthe power when it detectsa fault.
   电路断路器在检测到故障时会切断电源。
3. 3. The engineerswitched the voltage from220V to110V for safety reasons.
   工程师出于安全原因将电压从220V切换到110V。