cloud的形容词是 cloudy 多云的；
cloud
n.云;云朵;云状物(如尘雾、烟雾、一群飞行的昆虫);阴影;忧郁;焦虑;令人忧虑的事;
v.使难以理解;使记不清楚;使模糊;显得阴沉(或恐惧、愤怒等);看起来忧愁(或害怕、愤怒等);(尤指用无关的话题来)混淆，搅混(问题)
The plane was flying in cloud most of the way.
飞机一路大多在云层里飞行。
We could see the moon through a break in the clouds.
我们能从云缝里看到月亮。
Fog and low cloud cover are expected this afternoon.
预计今天下午有雾和低空云层。
Her father's illness cast a cloud over her wedding day.
她父亲的病给她的结婚喜庆日蒙上了一层阴影。
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