动词短语
中文翻译：关闭电源接触点
同义词：
['power down', 'turn off', 'disconnect']
例句：
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1.Please ensure all electrical equipment is powered off before you leave the room.
请确保在你离开房间之前，所有电气设备都已断电。
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2.The power switch was accidentally turned off during the storm.
暴风雨期间，开关不小心被关掉了。
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3. After the power outage, we had to disconnect our computers from the network.
停电后，我们必须断开我们的电脑与网络的连接。