The researchers measured sleep duration, trouble falling asleep, the number of wake-ups and problems going back to sleep if awakened.
研究者测量了睡眠持续时间，干扰睡眠后，醒来次数以及睡醒后再入睡的问题。
The researchers measured sleep duration, trouble falling asleep, the number of wake-ups and problems going back to sleep if awakened.
研究者测量了睡眠持续时间，干扰睡眠后，醒来次数以及睡醒后再入睡的问题。
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