名词
中文翻译：计时器
同义词：
['clock', 'timer', 'stopwatch']
例句：
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1. The clock on the wall tells me it's time to leave.
墙上的钟告诉我该走了。
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2. He set a stopwatch for the race and started counting down.
他为比赛设置了手表，开始倒数。
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3. She used her stopwatch to measure the distance she ran.
她用她的手表测量了她跑的距离。