stopwatch

The track coach used a digital stopwatch to record exactly how long it took the sprinter to finish the race.

(Chinese) 田径教练使用数字秒表来记录短跑运动员跑完比赛所花费的确切时间。

Press the button on the stopwatch the moment the swimmer touches the wall to get an accurate time.

(Chinese) 在游泳者触壁的一瞬间按下秒表上的按钮，以获得准确的时间。