The force of collision spewed large amounts of debris into the atmosphere, darkening the skies for several years before the finer particles settled.

碰撞的力量将大量碎片喷射到大气中，在更细的粒子落下之前，天空会变暗几年。

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In other cases, the finer particles may be removed, while the sand-sized particles are accumulated to form mobile hills or ridges of sand.

在其他情况下，较细的颗粒可能被除去，而沙粒大小的颗粒堆积起来形成移动的山丘或沙脊。

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Worms reject the finer particles when feeding.

蚯蚓取食时丢弃了较细的颗粒。

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Heavy, gritty particles seem to be sitting at around 8, 000ft (2440m) , while lower down in the atmosphere there are sulphurous chemicals and finer dust particles.

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