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Pileus cloud above the sarychev volcano as it erupts , at the kuril islands , russia .

俄罗斯千岛群岛sarychev火山爆发时出现在火山上空的菌盖云。

Pileus clouds are small clouds that form on top of a bigger cloud ; for example forming above a cloud of volcanic ash during a volcano eruption .

菌盖云是在一片更大的云上形成的小云；例如，当火山喷发时，在火山灰上空形成的菌盖云。

Chuang says pileus clouds look similar to the smooth caps sometimes seen on top of cumulus clouds , which are actually ice caps .

庄说菌盖云看起来和有时出现在积云顶端的平坦的帽子很相似，而积云顶的帽子实际上是冰帽。

Pileus cloud above the sarychev volcano as it erupts in the kuril islands russia : pileus clouds are small clouds that form on top of a bigger cloud .

俄罗斯千岛群岛sarychev火山爆发时上空的菌盖云：菌盖云是在更大的云上形成的小云。