To some extent, ARM works like a powerful stopwatch, providing an interface that contains start and stop entries just like the stopwatch that a coach USES.

在某种程度上，ARM的工作类似于一个功能强大的秒表，并提供了一个包含start和stop条目的接口，就像教练使用的秒表一样。

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Throughout your day record the time whenever you start or stop any activity. Consider using a stopwatch to just record time intervals for each activity.

一整天当你开始或完成某个活动时都把时间纪录下来，可考虑使用秒表来记录每个活动的时间间隔。

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