If you sleep longer than about 20 minutes, you'll pass out of REM and into other (deeper) phases of sleep.
如果你睡了超过20分钟，你会度过眼动睡眠而进入睡眠的下一阶段，深度睡眠。
Driver says it’s okay to periodically sleep longer if you need time to bounce back from an all-nighter, but don’t make it a habit.
Driver还说，如果你经常熬夜需要时间恢复元气的话，可以选择固定的日子延长睡眠时间，但不要养成习惯。
You will live longer and sleep better if you avoid bright lights at night.
当你在夜间避免强光照射时，你就会寿命更长，睡眠更好。
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