quitter [ˈkwɪtɚ]

例句:

• He is a quitter who is temperamentally unsuited to remaining a champion.
  他是个遇难而退的人，照他的性格，不可能长期保住冠军的称号。
  
• He won't resign because he's not a quitter.
  他不会辞职的，因为他不是一个轻言放弃的人。
  
• He was tagged as a quitter.
  他被人们称为胆小鬼.
  
• "I have never been a quitter," said Nixon.
  来自VOA
• Kevin told his father he didn't want to be a quitter.
  来自WSJ
• For every eight people who use varenicline, one will become a long-term quitter.
  来自BBC