underachiever [ˌʌndərə'tʃi:və(r)]

例句:

• He just wanted people to stop calling him disadvantaged, an underachiever.
  他只希望人们不要再叫他后进生、差等生。
  
• She will never gain weight, she will become a metabolic underachiever.
  她永远不会发胖, 只是新陈代谢不足.
  
• If the solar system has an underachiever, it has to be Venus.
  如果太阳系中有一个“失败者”, 那它一定是金星.
  
• Those who write off Moyes as an underachiever fail to understand a simple fact.
  来自THETIMES
• Not a bad album as such it was, artistically at least, a curious underachiever compared to In Rock.
  来自BBC
• Today, however, Germany is coming to grips with a much different report card that of an academic underachiever.
  来自WSJ