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来源:雅诚德英语网
The Mariner spacecraft found that the surface of Mars, as well as that of its two moons, is pitted with impact craters formed by meteoroids falling in from space.
水手号宇宙飞船发现火星表面,还有它的两个卫星表面,都有由太空坠落的流星体造成的陨石坑。
The Mariner spacecraft found that the surface of Mars, as well as that of its two moons, is pitted with impact craters formed by meteoroids falling in from space.
水手号宇宙飞船发现火星表面,还有它的两个卫星表面,都有由太空坠落的流星体造成的陨石坑。