know to one's cost []

以下由轻松背单词网站提供

通过自己的痛苦经历认识到，亲自体验到

He known to his cost that motoring is dangerous.他知道开汽车是危险的。
He is a ruthless businessman,as I know to my cost.他是一个心狠手辣的商人，我是付出了代价才知道这一点的。