We regret to inform you that you have ten days left to pay the account, otherwise, we'll close it.

很不幸地告知你，你只有十天的时间付账，否则我们就要关停账户了。

Dear Mr Watson, we regret to inform you that you have not got the job, hmmm, sounds a bit too direct.

亲爱的沃森先生，我们很遗憾地通知你，你没有得到那份工作，嗯，听起来太直接了。

How about 'Dear Mr Watson, Thank you for your application to WebWare. We regret to inform you that you weren't successful.'

“亲爱的沃森先生，感谢你对 WebWare 的职务申请。我们遗憾地通知你，你没有成功入选”，这句怎么样？

We regret to inform you that your application has been rejected.

【inform】我们很遗憾地通知你，你的申请未被接受。