his·to·ri·an /hɪˈstoriən, ˈstɔr, ˈstɑr-/
  歷史學家,史家
  His·to·ri·an n.
  1. A writer of history; a chronicler; an annalist.
     Even the historian takes great liberties with facts.   --Sir J. Reynolds.
  2. One versed or well informed in history.
     Great captains should be good historians.   --South.
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  historian
       n : a person who is an authority on history and who studies it
           and writes about it [syn: historiographer]