Apparently, he made the decision in haste. Now he is very regretful.

显然他作那个决定太匆忙了，现在他非常后悔。

youdao

After that we will be very regretful, but we can't change the fail reality.

事后虽后悔莫及，但却仍然挽回不了失败的现实。

youdao

Don't scold me anymore, okay? I know the mistake was my fault, I'm very regretful!

你们别骂我了行么，我知道错了是我犯贱，我很后悔！

youdao

"I think it is all very regretful, " he adds.

FORBES: The Spy in the Lab