关闭的英文短语是shut off。

shut off：

关闭;关上;使停止运转;（通常因沮丧而）躲开他人，不见人，不与人来往;切断，停止（…的供应）

I have to to the hard power shut off and start it back up that way.

我要到硬盘电源关闭和启动它备份的方式。

Before you start cleaning, make sure that all your equipment is shut off.

开始清洁前，请将所有的设备关闭。

Always turn off power and shut off and release pressures before disassembly.

拆卸前通常要关掉电源、关闭设备并释放压力。