复数： cumuli cumulus

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Small white cumulus clouds obscure some parts of the island .

图中白色的小积云遮住了小岛的一些地方。

These clouds are cumulus clouds that are usually formed in lower altitude .

这些通常是在低海拔形成的积云。

A band of cumulus lingered over the great hall of the people .

一条积云带在人民大会堂上空徘徊。

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。

This makes the clouds puff downward instead of up like cumulus clouds , and they end up being like upside-down bubbles .

这就使得云彩向下膨胀，而不是像积云那样向上膨胀，所以它们最终都很像颠倒的泡泡。