She looked back on the past without regret.

她回首往事毫无遗憾。

《牛津词典》

Guard him well, General, that he may see his father once again-and that I may die without regret.

将军可护持此子，教他得见父面，妾死无恨！

youdao

And though regret can be painful, a life without regret isn't only near impossible, it would lack a fundamental emotion that spurs people to avoid future mistakes.

虽然说追悔让人痛苦，但是没有后悔的人生不仅近乎不可能，这样的人生还会使人缺乏一种避免自己未来犯错的基本情绪。

youdao

Present me with such a plan, and I will praise it with pleasure and accept it without the slightest feeling of regret."

VOA: special.2009.03.19

They had separated from their family without regret when they were, they thought, thirteen and fourteen.

NEWYORKER: The Woman of the House

They serve like their service members with pride, and they do it without complaint and they do it without regret.

WHITEHOUSE: First Lady Michelle Obama and Dr. Jill Biden Address National Governors Association | The White House

But he saw how she kept getting up, kept doing that same job year after year, without complaint, without regret.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event