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美国南北战争结束后，退伍的炮兵整天无所事事。经俱乐部主席巴比康提议，大家开始铸造能将炮弹送到月球去的大炮。几经周折，他们终于登上月球，并安全返回地球。。Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。