u开头的单词有哪些

例句：

：  Life had sad, even ugly facts .人生是有一些悲哀的、甚至丑恶的'事实。

le ： I am unable to keep my engagement with you .我不能和你们朝夕相处。

rtain：Faith is an uncertain relief . 信仰实在是一种解救,虽然看来有点渺茫。

e：Immy is uncle to all the kids who like to go boating with him. 那些喜欢和吉米一起乘船游玩的孩子都把他当叔叔

r:Do you think that everything is under control?你是否认为一切都在控制之中?

rgroundEarthquakes take place far underground .地震则发生在地球的极深处。