plagiarist
  剽竊者,文抄公
  Pla·gia·rist n. One who plagiarizes, or purloins the words, writings, or ideas of another, and passes them off as his own; a literary thief; a plagiary.
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  plagiarist
       n : someone who uses another person's words or ideas as if they
           were his own [syn: plagiarizer, plagiariser, literary
           pirate, pirate]