25 年前
视频简介
“观一城文脉知古今春秋”，综合频道大型系列纪录片《文脉春秋》，聚焦中华大地上各具特色的历史文化名城、名镇、名街区、古村落，探寻它们的历史文化、营城智慧、独有格局、特色风貌，讲好其中赓续历史文脉、谱写当代华章的时代故事，展现它们在中国式现代化发展的过程中焕发的新活力，新魅力。。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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