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Sleep is the single most effective thing you can do to reset the health of your brain and body. This is true for adults, teenagers and children alike. 睡觉是重置大脑和身体健康的最有效方法。对于成年人来说如此，对于青少年和儿童来说也是如此。 Yet, we do not start sleeping when we are born. We actually start sleeping many months before that. Often, through speech or song, expecting parents will thrill at their ability to elicit small kicks and movements from their in-utero child. 但我们并不是出生的时候才开始睡觉。事实上，早在出生前几个月我们就开始睡觉了。通常，父母希望通过说话或音乐激发子宫内的宝宝踢一踢或动一动。 Though you should never tell them this, the baby is most likely fast asleep. Prior to birth, a human infant will spend almost all of its time in a sleep-like state, much of which resembles a stage called rapid eye movement sleep, or REM sleep. The sleeping fetus is therefore unaware of its parents' performative machinations. 虽然你永远都不该告诉他们，但子宫内的宝宝很有可能睡的很熟。出生之前，婴儿几乎所有时刻都处于睡眠状态，其中大部分过程与浅睡眠阶段相似。因此，正在睡眠状态中的宝宝根本就不知道父母的表演意图。 | 
