stop watch function

例句：

1. 1. The engineer used a stop watch to time the experiment.
   工程师使用停表来计时实验。
2. 2. The stop watch function is essential for accurate timing in sports events.
   停表功能对于体育赛事中准确的计时至关重要。
3. 3. During the race, the runners had to use their stop watch functions to keep track of their progress.
   在比赛中，运动员必须利用他们的停表功能来跟踪自己的进展。