1.
A rain cloud, especially a low dark layer of clouds such as a nimbostratus.
雨云雨云，尤指象雨层云一样的深色低云层
2.
Monarch of Clouds,Rain God,and the Sport of Cloud and Rain:A New Study of the Folklore of Monarch of Clouds
云中君·雨师·云雨——《云中君》的民俗学新证
3.
a day of rain and cloudy skies
有雨、 多云的一天
4.
Those dark clouds will probably bring rain.
那片乌云很可能要降雨。
5.
Do dark clouds signify rain?
有乌云是否显示要下雨?
6.
Dark clouds were gathering in the sky. Heavy rain would come soon.
乌云密布，大雨就要来临。
7.
The wind Blew, the clouds gathered, the rain fell.
起风了，云聚了，下雨了。
8.
The clouds appeared inclined to thunder.
阴云密布，好象要有雷雨。
9.
Dark clouds denote rain.
乌云是下雨的预兆。
10.
The clouds brought a threat of rain.
阴云带来要下雨的征兆。
11.
Black clouds are an unmistakable sign of coming rain.
乌云是下雨的明显前兆。
12.
Those clouds indicate rain.
那些云是下雨的前兆。
13.
The dark clouds mean rain.
乌云是下雨的征兆。
14.
leaden clouds promising rain
预示有雨的铅灰色的云.
15.
It's fine/cloudy/ raining/snowing/windy.
天晴/多云/下雨/下雪/有风。
16.
Black clouds portend a storm.
乌云为暴风雨的前兆。
17.
Towards midnight the rain ceased and the clouds drifted away.
夜半时分雨收云散。
18.
Black clouds threaten a storm.
乌云是暴风雨的先兆。