buzzer

n.

蜂鸣器，嗡嗡作声的东西；门铃；汽笛；〈俚〉信号兵

复数：buzzers

1. Come in when you hear the buzzer.
   你听到蜂音电铃声就进来。
2. I pressed the buzzer to his house and waited.
   我按了他家的门铃,然後等著。
3. The buzzer sounds.We reluctantly make our way to the shopfloor.
   汽笛响了，我们不情愿地向着车间走去。

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