I am regretful for what I have done .

我对我的所为深感遗憾。

I felt regretful about what happened .

对于发生的事我深感遗憾.

They sincerely want to let their customers know what they are getting into , because a regretful customer is a vengeful one .

他们是真心诚意的想让他们的客户了解他们正在参与的事，因为一个后悔的客户会成为一个复仇者。

This is a big moment for america and iraq , yet the iraqi government was more regretful than jubilant , calling the deal the best it could achieve after more than a year of negotiations .

这对于美国和伊拉克都是重要的时刻，尽管伊拉克政府对此后悔多过喜悦，并认为在长达一年多的谈判之后，这个协议本应当达到更多目的。

And his first television interview since his may 14 arrest painted a portrait of a regretful man .

自5月14日被逮捕以来在其首次电视访谈中，卡恩被描述成了一个懊悔的男人。