My biggest regret is not winning the America's Cup in my lifetime.

我这辈子最大的遗憾就是没能赢得美洲杯。

金山词霸

"His condition fills me with profound regret," he admitted sorrowfully.

"他的状况让我充满深深的遗憾，"他悲伤地承认。

金山词霸

It is with deep regret that the United States decided to participate in these protests.

深感遗憾的是，美国决定参与这些抗议活动。

金山词霸

He expressed regret over approving her resignation from the role.

他对同意她辞去这一职位表示遗憾。

金山词霸

"I've had a fulfilling career," he said, "I don't regret a single choice."

“我的职业生涯很充实，”他说，“我对任何一个选择都不感到遗憾。”

金山词霸

I regret that I cannot attend your wonderful party.

很遗憾，我不能参加你的精彩聚会。

金山词霸

We regret to announce that your request has been declined.

我们很遗憾地宣布，您的请求已被拒绝。

金山词霸

It is to be regretted that so many talented individuals abandon their dreams without fulfillment.

遗憾的是那么多有才华的人放弃了自己的梦想而未实现。

金山词霸

It is with deep regret that we announce the cancellation of the event.

我们非常遗憾地宣布活动的取消。

金山词霸

What is your biggest regret (= the thing you feel most sorry for in your past) ?

你最大的遗憾是什么？

金山词霸

She left the company in 2010, much to the regret of her colleagues.

她于2010年离开了公司，这使她的同事深感遗憾。

金山词霸

It doesn't seem quite fair,then, to compare the regrets of parents to the regrets of the children. 

把有孩子夫妻的后悔与无子女夫妻的遗憾拿来比较,这显然不太合理。 

11年12月考研真题 | 阅读

Viewing the past in high definition can make it very difficult to get over pain and regret.

把过去记得太清楚可能令人非常难以从痛苦和遗憾中走出来。

17年6月四级真题（第一套）| 阅读

They regretted the closure of the day care center.

他们为托儿所的关闭感到遗憾.

期刊摘选

I regret that I cannot be of service to you.

我很遗憾无力为你效劳.

期刊摘选

Your life only lasts a few decades, so be sure that you don't leave any regrets.

人生短短几十年, 为此不要给自己留下什么遗憾.

期刊摘选

The Prime Minister expressed her regret at the failure of the talks.

首相对谈判失败表示遗憾.

《简明英汉词典》

It is a matter to be regretted that he should have failed again in the examination.

他竟然又一次考试不及格,这是一件令人遗憾的事.

《简明英汉词典》

There may be regrets, sadness and laments, but all I can do now is smile.

也有很多的遗憾, 悲伤跟悔恨, 但是现在我所能做的也只有付之一笑罢了.

期刊摘选

We regret to point out that the goods delivered areup to the standard of the samples.

我们遗憾地指出所交的货物与样品标准不符.

期刊摘选

If tomorrow never comes, you'llhave no regrets about today.

这样,即使明天永不到来, 你也不会给今天留下遗憾.

期刊摘选

Once she's gone, only fond memories of the past and also regrets will be left.

一旦她去了, 剩下就只有对过去岁月的美好回忆和无尽的遗憾.

期刊摘选

I regret to tell you that my friend is ill.

遗憾地告诉你,我的朋友病了.

《现代英汉综合大词典》