They will bitterly regret what they have done for ever more.

他们今后将痛悔他们所做过的事情。

《柯林斯英汉双解大词典》

The discoveries also help to explain why children can often have clear memories of what they have done, but then forget them just several years later.

这些发现还有助于解释为什么孩子们经常能清楚地记得他们做过的事情，但几年后就会忘记。

youdao

In many ways they have done a great job.

他们在很多方面都做得很好。

youdao

The guidelines urge doctors not to use other imaging methods like CT or MRI scans until they have done this.

VOA: special.2009.09.02

We had this displayed in the hallway, so when it was Parents' Night, the kids were pretty proud of what they have done.

我们把它们展示在走廊里，这样一来，到家长日的时候，孩子们都格外为自己的作品自豪。

麻省理工公开课 - 媒体、教育、市场课程节选

And they have done this with enormous success.

而且他们这项工作取得了极大的成功。

耶鲁公开课 - 金融市场课程节选

Depressingly, treatments do not seem to be advancing as they have done with adult cancer.

ECONOMIST: Children and cancer

They have done the legal analysis required to reach the conclusion that it is unconstitutional.

WHITEHOUSE: Press Briefing by Deputy Press Secretary Josh Earnest

"It seems like all they have done is create a few showcases, " he says.

WSJ: In Former Taliban Sanctuary, an Eerie Silence Takes Over