名词
中文翻译：Unknown
同义词：
['timer', 'stopwatch', 'timer', 'clock', 'watch', 'timing device']
例句：
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1. The teacherused an acetimeter to measure the students' performance.
老师使用秒表来测量学生的表现。
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2. She set up an acetimeter to record the duration of her exercise routine.
她设置了秒表来记录她的锻炼时长。
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3. The engineer used an acetimeter to check the accuracy of his invention.
工程师使用秒表来检查他的发明的准确性。