BEC写作套话：非常遗憾我们奉告您关于
非常遗憾，我们奉告您关于，等。
l. We regret to inform you that (of)
2. We are sorry to have to draw your attention to
3. We regret to have to say that
4. We regret to advise you that
5. We very much regret to announce you that
6. It is most regrettable that we have to inform you that (of)
7. It is with our greatest regret that we must inform you that (of)
8. To our greatest regret we must herewith inform you that (of)
9. It is a matter for regret that I have to inform you that (of)
10. It is to be regretted that I must inform you that (of)
11. It is with regret and reluctance that we have to inform you that (of)
12. It gives us a deep sorrow that we have to announce you that
13. It causes me much sorrow to have to say that
14. I feel sorry for having to announce you that
15. I express my sorrow for announcing you that
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