v. feel sad about the loss or absence of
v. decline formally or politely
v. express with regret
n. 遗憾, 后悔, 悔恨, 抱歉, 歉意
vt. 为...感到遗憾, 后悔, 惋惜, 懊悔, 抱歉
vi. 感到抱歉
1. I regret not studying harder for the exam.
我后悔没有更加努力地学习这次考试。
2. She expressed her regret for missing the meeting.
她对错过会议表示遗憾。
3. They will regret their decision if they do not take action soon.
如果他们不尽快采取行动，他们会后悔这个决定。