Lunar craters can be plainly seen with the aid of a small telescope.

借助小型望远镜可以看清月球上的环形山。

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The astronauts gazed down upon the lunar craters, the first humans to see them from so close.

航天员们向下凝视着月球的环形火山口，这是人类首次从这样近的距离看到它们。

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Many scientists believe that Lunar craters were formed by the collision of meteors and comets against the moon.

许多科学家相信，月球坑穴是流星和彗星碰撞月球所造成的。

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And if frozen water were found in lunar craters, that would indeed be icing on the cake.

ECONOMIST: Astronomy

He also worked on the unmanned flights that preceded them, which confirmed a prediction that he had made from his study of lunar craters: contrary to popular belief, an astronaut landing on the moon would not sink into the dust.

ECONOMIST: Gene Shoemaker

This was when it was first pointed out that, because sunlight near the lunar poles comes in at a shallow angle, the floors of the deeper craters there might be in permanent shadow.

ECONOMIST: Creative destruction