n.積云；堆積
A band of cumulus lingered over the Great Hall of the People. 一條積云帶在人民大會堂上空徘徊。
Piles of cotton-like cumulus clouds fill the sky on a clear day. 晴朗天空堆滿了像棉花一樣的積云。
n.高積云
n.卷積云
