volcanic sand
英
美
- 火山沙,火山砂
双语例句
- In the black volcanic sand was left the trails of their tiny fin prints.
它们在黑色的火山沙上只留下了小小的鳍状印迹。 - The sand, which is formed by dark green crystals called olivine, is brought to the surface by volcanic activity.
这片绿沙由称为橄榄石的墨绿色结晶体形成,被火山活动带到地表。
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