She ruefully said goodbye to her parents.

她悲伤地跟父母告别。

Jack talked ruefully about his unhappy childhood.

杰克悲伤地谈起他不幸的童年。

He said ruefully that he would withdraw from the competition.

他遗憾地表示他将退出比赛。

He grinned at her ruefully.

他对她咧嘴一笑，表示遗憾。

'So this is goodbye,' she said ruefully.

她悲伤地说：“那么，这就是告别了。”

He rubbed the back of his neck and smiled ruefully at me.

他揉搓着后脖颈，冲我懊悔地笑了一下。

He smiles ruefully at the irony.

他沮丧地微微笑，有点讽刺的意味。

I made a big mistake, he said ruefully.

“我犯了个非常大的错误，”他伤心地说。