shù : měi róng > qián hòu
yīngwénjièshì:
  1. n.  back and belly
  2. n.  around
  3. n.  round about
  4. n.  from beginning to end
  5. n.  altogether
  6. n.  in front and behind
  7. n.  front and back
  8. n.  the front and the rear
  9. n.  before and after
  10. n.  or thereabouts (indicating time)
  11. v.  front and back, referring to a sequence