mi·cro·cosm /ˈmaɪkrəˌkɑzəm/
  小宇宙,小世界,人類
  Mi·cro·cosm n.
  1. A little world; a miniature universe.  Hence (so called by Paracelsus), a man, as a supposed epitome of the exterior universe or great world.  Opposed to macrocosm.
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  microcosm
       n : a miniature model of something