cumulus
n. 积云;堆积,堆积物
复数 cumuli或cumulus
例句
How much does the water in a cumulus cloud weigh?
一朵积雨云所含的水有多重呢?
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。
Cumulonimbus, along with cumulus, are the most dramatic types of cloud.
积雨云和积云是云中最神奇的类型。