toughie

noun

1. 坚定勇敢的人；无畏的人
   a person who is determined and not easily frightened
2. 艰难的选择；难题
   a very difficult choice or question

1. Gong Li, mainland China's first superstar actress, is a toughie.
   巩俐，中国大陆第一个超级巨星，是个坚强的人。
2. She turned and asked me a real toughie.
   她转过身，问了我一个难题。

noun

1. a particularly difficult or baffling question or problem

   Synonym:    poserstumpersticker

2. an aggressive and violent young criminal

   Synonym:    hoodhoodlumgoonpunkthugtoughstrong-armer