遗憾的

• woeful
• regretful
• sorry
• mortifying

例句

1. 遗憾的是他不肯穿外衣。
   I'm sorry he refuses to wear a coat.
2. 因时间仓促，没有充分及时安排，这是我唯一深感遗憾的事。
   My only regret is that on account of lacking of time, I can not pay enough attention to the arrangement.
3. 那是令人遗憾的事。
   It is a matter for regret.
4. 遗憾的是 ...
   It is to be regretted that ...