backtrack [ˈbækˌtræk]

例句:

• We had to backtrack to the corner and cross the street.
  我们不得不原路返回到拐角处过街。
  
• Can we just backtrack a little bit and look at your primary and secondary education?
  我们能不能回过头来谈谈你的小学和中学教育？
  
• Air cargo loading problem by backtrack algorithm is solved.
  用回溯算法解决飞机货舱装载问题.
  
• Some change direction or even backtrack.
  来自VOA
• The clamour of criticism has forced Mr Nath to backtrack in some cases.
  来自BBC
• The move was so unpopular that it recently had to backtrack on that policy.
  来自CNN