对几乎所有的青少年而言,褪黑激素(生物钟的安眠药)直到晚上11点左右才开始分泌,并一直持续到早晨8点左右。
This means that most teenagers simply can't fall asleep until this secretion begins, and find it impossible to wake up until the melatonin turns off.
也就是说,大多数的青少年要到褪黑激素开始分泌才能入睡、直到褪黑激素停止分泌才能醒来。
This fixed pattern of melatonin secretion in teens doesn't normalise until they're in their 20s.
直到20多岁,青少年这种固定的褪黑激素分泌模式才会开始正常。
So the unique sleep/wake pattern of teenagers is beyond their control.
所以这种独特的入睡/起床模式是青少年无法掌控的。
There are serious consequences if teens fail to get adequate sleep. Those who are sleep-deprived – defined as getting less than eight hours per night – are more likely to smoke, drink and take drugs.
若青少年未能获得充足睡眠,后果将十分严重。那些睡眠不足的青少年--定义是每晚睡眠时间少于8小时--更有可能吸烟、喝酒、嗑药。
With less than nine hours of sleep per night, depression among teens rises significantly.
由于每晚睡眠不足9小时,患抑郁症的青少年大幅增多。
Research shows around half of teenagers who sleep four hours or less per night feel sad and hopeless, compared to those who sleep longer.
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