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烽火连天战事连连，朝廷下令训练一批骁勇善战的将士与贼兵抗衡，训练非常的艰辛。但是这帮被训练的将士斗志涣散，寻花问柳，他们能否克服种种困难磨练成抗敌勇士？外有贼兵虎视眈眈，内有卖国贼通风报信，内忧外患，孤胆英雄能否力挽狂澜，保家卫国？。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 ...。