die-hard

adj.

顽固的，死硬的；

1. Because their hearts had turned hard, stubborn and obstinate.
   重点是在于他们的心已经是硬的，是固执的，是顽固的。
2. But ignorance and misinformation about the health hazards of beryllium die hard.
   关于健康的破坏物铍的无知和误传是很顽固的。

Die-hard and fair weather fans: effects of identification on BIRGing and CORFing tendencies.
What makes a die-hard entrepreneur? Beyond the ‘employee or entrepreneur’ dichotomy
Defense of a psychometric approach to the definition of academic giftedness: A conservative view from a die-hard liberal
Infected wound management: advanced technologies, moisture-retentive dressings, and die-hard methods.
Die-hard plastic deformation behavior in an ultrahigh-strength Fe–Ni–Al–C alloy
A Hybrid Approach for Course Scheduling Inspired by Die-hard Co-operative Ant Behavior
Federal Rule 44.1 and the "Fact"Approach to Determining Foreign Law: Death Knell for a Die-Hard Doctrine
Die-hard sensor network: robust wireless sensor network dedicated to disaster monitoring
A Die-Hard Aristocracy: Competitive Balance in Italian Soccer 1929-2009
Frigid Conditions No Match for Die-Hard Anglers