画龙点睛yīngwénjièshì:
  • n.  add the touch that brings a work of art to life
  • n.  add a word or two to clinch the point
  • n.  put life into sth.like dotting the eyeball in painting a dragon

(fēizhùcèchéngyuánměiyèzànxiàn 4 lì)