ruefully
adv. 可怜地；悲伤地
例句
He grinned at her ruefully.
他对她咧嘴一笑，表示遗憾。
《柯林斯英汉双解大词典》
'So this is goodbye,' she said ruefully.
她悲伤地说：“那么，这就是告别了。”
《牛津词典》
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。
