1940, colloquial shortening of intercommunication (mid-15c., "discussion, conference;" see inter- + communication), which is attested from 1911 in reference to systems of linked telephones.
权威例句
1. He pushed a button on the intercom. "Yes?" came a voice.
他按了内部对讲机上的一个按钮。“有什么事吗?”一个声音问道。
2. The intercom buzzed and he pressed down the appropriate switch.
对讲机发出嗡嗡声,他按下了相应的开关。
3. to announce sth over the intercom
通过内部通话系统宣布
4. The manager spoke to the employees over the intercom.
经理用内部的通话系统向员工讲话.
5. " What are you doling?'she once demanded over the intercom.