ADJ-GRADED
				后悔的;懊悔的;遗憾的
				If someone is rueful, they feel or express regret or sorrow in a quiet and gentle way.
例句
						He shook his head and gave me a rueful smile...
						他摇了摇头,遗憾地对我笑了笑。
						'Our marriage was a mistake,' she said, looking rueful.
						“我们的婚姻是个错误,”她说着,看起来懊悔不已。