A stopwatch is a tool used to measure time, usually for short periods. It is often used in sports and other activities to track how long something takes. A stopwatch typically has a start and stop button to begin and end the timing, and it can display time in hours, minutes, seconds, and fractions of a second. It is useful for timing races, exercises, or events that require precise measurements of time.

“stopwatch”的英语定义和含义

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