11 年前
视频简介
一个外号叫“邋遢大王”的男孩，因为不爱干净又贪玩，被老鼠骗进了“老鼠王国”的故事。。NOVA: Mysteries of Sleep Like virtually every other animal, humans need sleep to survive. But why? What do we gain from spending nearly a third of our lives in such a defenseless state? And what's at stake if we sleep poorly? The functions of sleep have long been something of a mystery. But now scientists are peering deep into the brain to see what happens while we snooze. One ...。
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儿童历险
