Call waiting
01
呼叫等待, 等待呼叫通知
a phone service that enables one to know or answer an incoming call during another call
例子
I was talking to my friend when call waiting notified me of another incoming call.
我正在和朋友说话时,呼叫等待通知我有另一个来电。
呼叫等待, 等待呼叫通知