buzzern.
英 'bʌzə | 美 'bʌzɚ
中文n. 蜂鸣器；嗡嗡作声的东西；信号手
词根词源
buzzer (n.)c. 1600, "buzzing insect," agent noun from buzz (v.). In reference to mechanical devices that buzz, from 1870 (steam-powered at first; electric mechanisms so called from 1884).
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