1. The sky was filled with white, fluffy cumuli.
天空中布满了洁白、蓬松的积云。
2. Large cumuli formed as the temperature rose.
随着气温升高，形成了巨大的积云。
3. Looking up, we saw massive cumuli drifting by.
抬头仰望，我们看到巨大的积云正漂浮而过。

A: Look at those beautiful cumuli in the sky!
A：看天空中那些美丽的积云！

B: Yes, they look like giant heaps of cotton.
B：是的，它们看起来像巨大的棉团。

1) 积云（气象学术语）

2) 堆积物

3) 聚集成堆的东西

1. 积云

e.g. The sky was dotted with small cumuli.
天空中点缀着一些小的积云。

noun

1. The plural form of cumulus, referring to clouds that appear as white, puffy masses.