optimist [ˈɑ:ptɪmɪst]

例句:

• You are either very young or an incurable optimist.
  你要么非常年轻，要么是个不可救药的乐天派。
  
• Pete, ever the optimist, said things were bound to improve.
  一向乐观的皮特说,事情必定是会好转的.
  
• We are optimist and realist.
  我们是乐观主义者,又是现实主义者.
  
• I'm an optimist about getting this relationship right.
  来自THETIMES
• Some optimist's are likening Junior Jack to a new Basement Jaxx.
  来自BBC
• Two weeks after quiting Chantix I became the happy optimist once again.
  来自SA