A watch made for timing things exactly: you press once to start it, once to stop it, and it shows how long something took, usually down to hundredths of a second. It is the coach's tool at the side of the running track, and also the science teacher's, the nurse's counting a pulse, the factory manager's timing how long a job takes.

A watch made for timing things exactly一種專門用來精確計時的錶 you press once to start it按一下開始計時 once to stop it再按一下停止 and it shows how long something took它會顯示某件事花了多久時間 usually down to hundredths of a second通常精確到百分之一秒 It它 is the coach's tool at the side of the running track是教練站在跑道旁會用的工具 and also the science teacher's也是理化老師會用的 the nurse's counting a pulse是護理師數脈搏時用的 the factory manager's timing how long a job takes也是工廠經理用來計算一項工作花多久時間的工具

These days most people use the stopwatch app on their phone, but the word did not change — you still 'start the stopwatch', 'stop the stopwatch', 'time someone with a stopwatch'.

These days most people use the stopwatch app on their phone現在大部分人都用手機上的碼錶app but the word did not change但這個詞沒有變 you still 'start the stopwatch'還是說「start the stopwatch」（啟動碼錶） 'stop the stopwatch'「stop the stopwatch」（停止碼錶） 'time someone with a stopwatch'「time someone with a stopwatch」（用碼錶幫某人計時）

There is a verb too, to stopwatch something, but it is rare; normally you say 'time it'. The phrase 'stopwatch precision' or 'to the stopwatch' means measured very exactly.

There is a verb too也有動詞用法 to stopwatch something就是 to stopwatch something but it is rare不過很少見 normally you say 'time it'通常會說「time it」 The phrase 'stopwatch precision' or 'to the stopwatch'「stopwatch precision」或「to the stopwatch」這樣的說法 means measured very exactly意思是量測得非常精確