I don't like the look of those clouds.

　　看那些云的樣子，我覺得可能要下雨。

　　The plane was flying in cloud most of the way.

　　飛機一路大多在云層里飛行。

　　We could see the moon through a break in the clouds.

　　我們能從云縫里看到月亮。

　　Fog and low cloud cover are expected this afternoon.

　　預計今天下午有霧和低空云層。

　　Her father's illness cast a cloud over her wedding day.

　　她父親的病給她的結婚喜慶日蒙上了一層陰影。