n.流星体

A very small,often dust - sized meteoroid. 微流星体很小的，尘埃大小的流星体

Of,relating to,or formed by a meteoroid. 流星(体)的属于、关于流星体的或由流星体形成的

A very small, often dust-sized meteoroid. 微流星体很小的，尘埃大小的流星体

Studies on meteoroid streams are briefly and systematically presented. 对流星群的研究作了简明而系统的介绍。

A bowl - shaped depression in a surface made by an explosion or the impact of a body,such as a meteoroid. 碗状凹陷由于爆炸或流星之类的物体的碰撞而在地表形成的碗状凹陷处