1. ADJ If you are regretful, you show that you regret something. 遺憾的; 后悔的[oft ADJ 'about' n, ADJ that]

Mr. Griffin gave a regretful smile. 格里芬先生遺憾地笑了笑。

2. regretfullyADV

He shook his head regretfully. 他遺憾地?fù)u了搖頭。