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As early as 1903, Konstantin Tsiolkovsky （康斯坦丁·契奥尔可夫斯基), a Russian scientist, had proved
As early as 1903, Konstantin Tsiolkovsky (康斯坦丁·契奥尔可夫斯基), a Russian scientist, had proved mathematically the possibility of using the reactive force that lifts a rocket to project a vehicle into space above the pull of the earth's gravity. (融合)
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