poweroff

例句：

1. 1. Please power off yourcomputer before you leave the room.
   离开房间前请先关闭你的电脑。
2. 2. The factoryhas to power off its generators whenit's closed.
   工厂在关闭时必须关闭发电机。
3. 3. The power company advised everyoneto power off their lights and appliances beforeleaving home.
   电力公司建议每个人离家前关掉所有灯光和电器。