A moment’s error can bring a lifelong regret.

一失足成千古恨。

Letting her friend borrow her car was an impulsive act that she immediately regretted.

让朋友借走她的车是她立刻就感到后悔的冲动行为。

I have no regret about leaving.

对离去一事毫不后悔。

I regret to say you are wrong.

十分抱歉, 错了。

I regret my ignorance on the subject.

很遗憾, 对此问题一无所知。

I regret what I've done to her.

后悔不该么对她。

I regret that you see it like that.

很遗憾看这件事。

I have had four acceptances and one regret.

已收到了邀帖和一辞谢帖。

They regretted agreeing to the convocation of that meeting.

他们后悔同意召开这个会议。

I declined with much regret your kind invitation.

很遗憾, 不能接受您的盛情邀请。

I regret to say that he is badly ill.

很遗憾他病得很重。

I regret that I am unacquainted with the place.

很遗憾对这地方不熟悉。

China regrets the abrogation of the Anti-Ballistic Missile Treaty.

中国对《反弹道导弹条约》失效感到遗憾。

I regret to say we're diametrically opposed to your ideas.

很遗憾只好说们完全不同意们的意见。

She felt sudden pangs of regret.

她突然感到痛悔不已。

You'll regret this.

这事将会后悔的。

I regret selling the house.

后悔卖了房子。

Due to the vicelike technology and sufficient self-confidence,we will never make you regret for your choice.

们以坚实的技术底蕴和充分的自信，让您在对们的加工产品作出选择之后不生悔意。

If he plays fast and loose with my daughter’s feelings, I’ll make sure he regrets it.

如果他玩弄女儿的感情，一定会让他后悔的。

Please extend my regrets to his majesty. I bid you farewell, arrivederci, sayonara, and all that sort of jazz.

请对陛下夸对他的威严的遗憾。叫告别，再见，再见，和所有爵士乐。