a type of cumulus (= a tall, rounded, white cloud with a flat base) formed in a very thin layer anda type of cumulus (= a tall, rounded, white cloud with a flat base) formed in a very thin layer and
卷积云（一种稀薄的高空云，由一系列规则排列的白云堆积形成,底部扁平） 比较 altocumulus
a type of cumulus (= tall, rounded, white cloud with a flat base) formed in a thick layer and founda type of cumulus (= tall, rounded, white cloud with a flat base) formed in a thick layer and found
层积云 比较 altocumulus
