他按了对讲机的一个按钮。“什么事？”传来一个声音。
使用紧急呼叫或帮助按钮，也可打电话或用对讲机寻求救助。
Use the ALARM or HELP button, the telephone or the intercom to call for assistance.
这种对讲机有个大声呼唤按钮，按压时会发出嘀嘀尖叫声。
The intercom had a loud call button that made a shrill beep when pressed.
这种对讲机有个大声呼唤按钮，按压时会发出嘀嘀尖叫声。
The intercom had a loud call button that made a shrill beep when pressed.
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