u开头的单词有：

unfortunately

美/ʌnˈfɔːrtʃənətli/英/ʌnˈfɔːtʃənətli/

adv.不幸地

双语例句：

Unfortunately, her only son died in a car accident.

不幸的是她唯一的儿子死在了一场车祸当中。

Unfortunately, we were trapped by the sandstorm and couldn't see anything.

遗憾的是，我们被沙尘暴困住了，什么也看不见。

Unfortunately, I lost the game.

不幸的是，我输了这场比赛。