buzz in
动词 v.
英文释义
动词 v.
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To open a remote-controlled door to allow (a person) to enter after sounding the doorbell or buzzer.
— I'm going to buy some more coffee. Could you buzz me in when I get back?
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On a game show or similar competition, to press the buzzer to provide an answer.
— It was the first contest to employ a "lock-out device": whichever contestant buzzed in first automatically shut the other out.
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数据来源: Wiktionary