die-hard [hɑrd]

例句:

• To get beat by your arch rivals is hard.
  来自BBC
• Then, the hard part begins - landing safely.
  来自BBC
• Two more children would later die from their wounds.
  来自BBC
• Such prejudices die hard.
  这些偏见很难消除。
  
• Old habits die hard.
  积习难改。
  
• It's not easy to break the old habits, for they die hard.
  改掉旧习惯很不容易, 因为它不易革除.