u开头的单词名词：
usually 通常地；
urban 城市的；
unite 统一，团结，结盟；
union 洋葱；
UFO 飞行器；
ukulele n. 夏威夷的四弦琴；
ulcer n. 溃疡，腐烂的事物；
undertake 承担
扩展资料
What time do you usually wake up in the morning?
通常你早晨几点钟醒？
We dont usually give presents to people at work.
我们一般不给在职职工送礼。
The ulcer has perforated.
溃疡已穿孔。
He has suffered from gastric ulcer for some years.
他胃溃疡有些年了。
She undertook the arduous task of monitoring the elections.
她承担了监督选举的艰巨任务。
In those days, the trip across country was a dangerous undertaking.
那个时期，越野旅行是一件危险的事情。
