Tonight will be cloudy.
今天夜间多云。
The legal position is very cloudy.
It was cloudy yesterday.
昨天是阴天。
Men are subject to sudden changes of fortune as the moon is subject to the changes of being full and crescent, cloudy and clear.
人有旦夕祸福，月有阴晴圆缺。
The sky is cloudy, and looks like rain.
天空阴沉沉的，像是要下雨。