1·You might be a diehard manual toothbrush user, but if you're not brushing as long or as thoroughly as you used to for reasons ranging from injury to arthritis, consider switching.
你或许是一名顽固的人力牙刷使用者，但是如果你像以前一样长时间或完完全全地刷牙并因此而损伤牙齿甚至发炎，那么是时候你考虑下转换方式了。
2·Europe is one risk: if the EU’s Lisbon treaty is in force when Mr Cameron takes office, and he swallows it, the diehard rejectionists whom his ambiguity on the issue has kept in line may revolt.
欧洲问题就是其中之一：如果欧盟的里斯本条约在卡梅隆先生就任时生效，此前由于他对该问题的模棱两可的态度而处于控制之下的顽固反对者们会爆发强烈的不满。
3·Even the Israelis, despite seeing Syria as their most diehard Arab foe, know that the Assads have kept their mutual border quiet.
尽管以色列人一直都把叙利亚视为其在阿拉伯最顽固的敌人，但是他们清醒的知道，是阿萨德家族维持着以色列边境的安宁；
4·Some diehard smokers blamed health-obsessed Americans for starting the trend.
一些顽固的吸烟者指责对健康着了迷的美国人开创了这一先河。
5·It gives police officers the power to stop people at customs checkpoints if the deadbeat, or Laolai - a derogatory term in Chinese used for diehard debtors - tries to leave the country.
按该法规，假如欠账不还的“老赖”(汉语中对欠账不还的顽固分成子的贬义称呼)试图离境，警方有权在海关检查站予以阻止。