名词
中文翻译：警钟锤
同义词：
['alarm clock', 'alarm bell', 'warning bell']
例句：
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1. The alarm clock woke us up at 6:00 a.m.
闹钟在早上六点把我们叫醒。
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2. The policeman used the alarm bell to scare away the thieves.
警察用警钟吓跑了小偷。
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3. The warning bell rang for everyone to gather in the main hall.
警钟响起，让大家聚集在主厅。