顽固主义

He's a diehard football fan and never misses a game.
他是个铁杆的足球迷，从不漏看一场比赛。
Despite the team's poor performance, she remains a diehard supporter.
尽管球队表现不佳，她仍旧是坚定的支持者。
I thought he'd give up after his first loss, but he's still a diehard.
我以为他在第一次失败后就会放弃，但他还是那么执着。
She's been a diehard fan of this band for over a decade.
她已经成为了这个乐队的忠实粉丝超过十年了。
He's always been a diehard believer in the importance of education.
他一直坚信教育的重要性。
She's a diehard optimist; no matter what happens, she always sees the best in people.
她是个铁杆的乐观主义者，无论发生什么，她总是看到人们最好的一面。
He's a diehard environmentalist and works tirelessly to protect nature.
他是个坚定的环保主义者，不遗余力地保护自然环境。
Even though the movie was a box office failure, she's still a diehard fan of the director.
尽管这部电影票房惨淡，但她仍旧是导演的坚定粉丝。
He's a diehard sports fan and spends every Sunday watching games.
他是个铁杆的体育迷，每周日都会观看比赛。
She's a diehard reader of mystery novels and can't get enough of them.
她是个狂热的推理小说读者，对它们爱不释手。