名词
中文翻译：计时器
同义词：
['chronograph', 'timekeeper例句：1. The chronometer was accurate to within a few seconds.（这个计时器非常准确，误差只有几秒钟。）']
例句：
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1. The chronometer was accurate to within a few seconds.
这个计时器非常准确，误差只有几秒钟。
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2.He used the chronometer to measure the time it took for the train to arrive.
他用这个计时器测量了火车到达所需的时间。
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3. The chronometer was used to record the exact moment of the event.
这个计时器被用来记录事件发生的确切时刻。