comb out
  清除,淘汰
  comb out
       v 1: remove unwanted elements; "The company weeded out the
            incompetent people"; "The new law weeds out the old
            inequities" [syn: weed out]
       2: smoothen and neaten with or as with a comb; "comb your hair
          before dinner"; "comb the wool" [syn: comb, disentangle]