Meaning of wū:
乌
abbr. for country names that begin with 乌[wu1]: Ukraine 烏克蘭|乌克兰[Wu1ke4lan2], Uzbekistan 烏茲別克斯坦|乌兹别克斯坦[Wu1zi1bie2ke4si1tan3] etc; surname Wu; crow
Wǒ xiǎng qù Wū kèlán lǚxíng.
我想去乌克兰旅行。
I want to travel to Ukraine.
Wǒ rènshi yī gè xìng wū de péngyǒu.
我认识一个姓乌的朋友。
I know a friend with the surname Wu.
Zài shù shàng yǒu yī zhī wūyā.
在树上有一只乌鸦。
There is a crow on the tree.
black
Tiānkōng jiànjiàn biàn dé qīhēi, xiàng shì yī piàn wū yún fùgài le yīqiè.
天空渐渐变得漆黑,像是一片乌云覆盖了一切。
The sky gradually turned dark, as if a black cloud covered everything.