有了适量的睡眠，你就应该在闹钟响前的五分钟精神抖擞地醒来。

With the right amount of sleep you should wake up fresh and alert five minutes before the alarm rings.

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当你正工作或读书时，让你的闹钟30分钟响一次。

When you're working or reading, set your alarm to beep every 30 minutes.

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将定时器或手表闹钟设定15分钟。

Set a timer or a watch alarm for fifteen minutes.

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