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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 ...。程愿和程予安本是一对恩爱的夫妻，然而在接踵而至的意外和乔心的诡计下两人逐渐产生隔阂。在程予安被确诊身患不治之症，不知真相的程愿却因怨恨对她百般折磨。。