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本片由中国电影家协会指导拍摄，讲述了在突如其来的逆境中，每一个普通人虽曾恐惧悲伤、手足无措，但依旧选择坚强面对、恪尽职守的故事，展现了从医生、患者、援鄂志愿者、社区基层到普通百姓，无畏逆行、守望互助的众生相。以真诚致敬每一个“平凡英雄”，也传递出生生不息的“春天”力量。。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 ...。