talk someone out of...劝服人放弃..

A: I'm going to try talking Carl out of his foolish plan.
A: 我想说服Seth 放弃他那愚蠢的计划。

B: You can try, but he is very hard headed.
B: 你可以试试看, 不过他很固执就是了。

"hard headed" 是形容人头壳很硬, 不随便改变主意的意思。"talk someone into something" 则和 "talk someone out of something" 刚好相反。

如: The salesman talked him into buying a new car.
那个销售员说服他买新车子。