regret的形容词令人惋惜的

　　This is more than regrettable; it is dangerous.

　　这不仅仅是令人感到遗憾的，更是危险的。

　　It is regrettable that you should make such a remark.

　　很可惜你竟然说这些话。

　　Yesterday is regrettable, tomorrow still hypothetical.

　　昨天已经逝去，明天还未到来。