It is a grey, cloudy sky.

天空灰暗多云。

The cloudy sky looks unsettled;

阴沉的天空在犹豫；

The cloudy sky was followed by rain.

天空乌云密布，接着下起雨来。

Cloudy sky drove the bathers off the beach.

阴霾的天空把海滩上的游客都赶跑了。

In that cloudy sky only one lone star can be seen.

的天上，只能看到孤零零的一颗星星。