有一种更小的星际碎片，是流星体。
An even smaller type of interplanetary debris is the meteoroid.
所谓陨石，就是降落于地球表面的大流星体。
The so-called meteorite is a large meteoroid landed on the Earth's surface.
宇宙充塞著沙粒大小的流星体。
Meteoroids are small particles in space with size similar to grains of sand.
宇宙充塞著沙粒大小的流星体。
Meteoroids are small particles in space with size similar to grains of sand.
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