乌[wū] 基本解释：
新英汉大词典：
- 乌(烏)[wū]
- 名词- （乌鸦） crow; raven; rook- （姓氏） a surname:
Wu Chengpin乌承批
- 形容词- （黑色） black; dark:
black eye;乌眼青
dark hair乌黑的头发
- 代词- （何; 哪里） how; what's:
How can such a thing be?乌有此事?
What's there worth mentioning about it?乌足道哉?
以上内容来源于：《新汉英大辞典》
例句与用法：
Dark clouds are a sign of rain or snow.
Black clouds are an unmistakable sign of coming rain.
The black clouds threatened rain.
When there are black clouds you can tell it's going to rain.
Those black clouds look a bit ominous.
乌的其他解释: