例句：

　　This would be regrettable.

　　這將令人遺憾。

　　Visitor a: Oh, it's so regrettable!

　　參觀者A：啊，太遺憾了！

　　He has committed a regrettable mistake.

　　他犯了一個令人遺憾的錯誤。

　　What's wrong with regretting?

　　后悔有什么不好？

　　It is no use regretting the past.

　　后悔過去是沒有用的。

　　He was regretting he'd called Mick now.

　　他現在在后悔給米克打了電話。