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万人心跳、同频共振！歌会集结近万名大学生，与朴树、陶喆、张韶涵、周深等重磅嘉宾合唱高歌、喊出心声。以日出为始，日落为终，在毕业的最后一天，见证青春最真实的样子！。核试验科教记录片。是自人类发明原子弹、氢弹以来的各种核爆炸记录，采访了许多美国参与核试验的专家，非常珍贵的第一手资料。著名的“小男孩”（广岛）和“胖男人”（长崎）就在这里，不可不看！ On July 16, 1945, at a site called Trinity, a plutonium bomb was assembled and brought to the top of a tower. The bomb was detonated, producing an intense flash and a fireball that expanded to 600 meters in two seconds. The explosive power was equivalent to 18.6 kilotons of TNT. It grew ...。