The Doomsday Clock is a symbolic clock face. The closer the clock is to midnight, the closer the world is estimated to be to global disaster. The clock represented the threat of global nuclear war 運籌帷幄作用 蘇聯 美國 末日時鐘
<p>蘇聯穿梭運輸車輛火箭蘇聯能源宇航員太空蘇聯暴風雪推進</p><p><em>蘇聯太空梭剪貼畫</em></p> 蘇 穿梭 運輸蘇聯穿梭車輛火箭蘇聯能源宇航員空間蘇聯暴風雪推進