n.流星體

A very small,often dust - sized meteoroid. 微流星體很小的，塵埃大小的流星體

Of,relating to,or formed by a meteoroid. 流星(體)的屬于、關于流星體的或由流星體形成的

A very small, often dust-sized meteoroid. 微流星體很小的，塵埃大小的流星體

Studies on meteoroid streams are briefly and systematically presented. 對流星群的研究作了簡明而系統(tǒng)的介紹。

A bowl - shaped depression in a surface made by an explosion or the impact of a body,such as a meteoroid. 碗狀凹陷由于爆炸或流星之類的物體的碰撞而在地表形成的碗狀凹陷處