4周搞定2000+托福核心词
海员，水手
mariner
常考释义
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.
水手计划中的宇宙飞船发现在火星表面布满来自太空的流星撞击表面形成的陨石坑，火星的两颗卫星也是如此。
来源于：阅读OFFICIAL25 P1n. = seaman<文>
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