To disconnect a piece of equipment means to separate it from its source of power or to break a connection that it needs in order to work.
双语例句
例：
The device automatically disconnects the ignition when the engine is switched off.
该设备在引擎被关闭时会自动断开点火装置。
2.?[T 及物动词] 切断（煤气、电、水、电话等的）供应
If you are disconnected by a gas, electricity, water, or telephone company, they turn off the connection to your house, usually because you have not paid the bill.
双语例句
例：
You are likely to be given almost three months – until the time of your next bill – before you are disconnected.
你很可能会得到将近3个月的时间–即直到你收到下一张账单为止——才会被切断供应。
3.?[T 及物动词] 使分离
If you disconnect something from something else, you separate the two things.
双语例句
例：
He disconnected the IV bottle from the overhead hook and carried it beside the moving trolley.