一分为二
English Expression:
  1. n.  split across
  2. n.  cut in twain
  3. n.  A whole divides into two
  4. n.  Everything tends to divide into two
  5. n.  dichotomy
  6. n.  separation into or between two groups or things that are opposed, entirely different, etc
French Expression:
  1. n.  dichotomie, un divisé en deux