乌云密布

ōu zhōu shàng kōng wū yún mì bù

欧洲上空乌云密布。

Dark clouds were gathering in the skies over Europe.

tiān yuè lái yuè hēi zhè wū yún mì bù de yàng zi yǒu xiē bù miào

天越来越黑，这乌云密布的样子有些不妙。

It’s getting dark and I don’t like the look of those rain clouds.

tiān kōng dùn shí wū yún mì bù

天空顿时乌云密布。

The sky was full of dark clouds immediately.