adj.顽固的，因循守旧的，死硬的
n.顽固分子

原形：diehard复数：diehards

He's a diehard fan of the Beatles and owns all their albums.
他是个披头士乐队的铁杆粉丝，拥有他们所有的专辑。
Despite the team's losing streak, the diehard supporters still show up to every game.
尽管球队处于连败状态，那些死忠支持者仍然每场比赛都到场助威。
My grandfather is a diehard collector of antique clocks; he has over a hundred in his collection.
我祖父是古董钟的狂热收藏家，他的藏品超过了一百件。
She's a diehard environmentalist who advocates for renewable energy sources at every opportunity.
她是个坚定的环保主义者，一有机会就倡导使用可再生能源。
As a diehard romantic, he believes that true love can conquer all obstacles.
作为一个不折不扣的浪漫主义者，他相信真爱可以克服一切障碍。
The diehard gamers stayed up all night playing the new release.
那些铁杆玩家为了玩新发布的游戏整夜未眠。
He's a diehard believer in traditional medicine and rarely visits Western doctors.
他是传统医学的忠实信徒，很少去看西医。
Even after the company went bankrupt, a group of diehard employees continued working without pay.
即使公司在破产后，一群忠诚的员工仍继续无偿工作。
Diehard music festival goers brave the rain and mud every year for their favorite bands.
音乐节的铁杆参加者每年都会不顾风雨和泥泞，只为看到他们最爱的乐队表演。
She's such a diehard traveler that she's visited over 100 countries and counting.
她是个十足的旅行爱好者，已经游历了超过100个国家，而且数目还在增加。