23 年前
视频简介
故事讲的是二十郎当岁的威尔史密斯饰演17岁的高中生威尔史密斯，住在黑人占76%，比较贫穷的西费城。由于招猫逗狗惹是生非，被老妈送到洛杉矶的阿姨家。。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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