91美女专区,yy4080午夜理论,国内自拍视频免费,韩国三级第一页,极品女优电影,亚洲精品无码原创,日韩久久性婷婷,国产精品操比视频,天堂夫妻av

核試驗(yàn)科教記錄片。是自人類(lèi)發(fā)明原子彈、氫彈以來(lái)的各種核爆炸記錄，采訪了許多美國(guó)參與核試驗(yàn)的專(zhuān)家，非常珍貴的第一手資料。著名的“小男孩”（廣島）和“胖男人”（長(zhǎng)崎）就在這里，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 ...