We acknowledge receipt of your letter dated the 3rd this month enclosing the reprography of the insurance policy, we are regret for your loss.

本月3日来函和保险单复印件已经收到，我们对贵公司所遭受的损失深表同情。

youdao

We regret to inform you that you are being furloughed indefinitely.

我们遗憾地通知你：你被无限期地停职了。

《柯林斯英汉双解大词典》

Before you get carried away with your little scene, Miss Wenzmore, I regret to have to tell you again that we are not planning to go into television.

在你被你的小场景冲昏头脑之前，温兹摩尔小姐，我很遗憾地再次告诉你，我们不打算进入电视行业。

youdao

And yet on social networks we speechify, we talk and we are saying plenty of things we might regret.

FORBES: We All Write Things We Regret, So What Can We Do About It?

We deeply regret what happened and are working tirelessly to regain the trust of our community.

FORBES: Blippy Apologizes For Google-Searchable Credit Cards, Announces New Security Plan

But even Day-Lewis, for all his flair and cunning, cannot spice the proceedings with much joy, and we are left with a hymn to regret.

NEWYORKER: Nine