em·u·la·tor /ˈɛmjəˌletɚ/
  競爭者
  emulator
  模擬器
  emulator
  仿真器
  Em·u·la·tor n.  One who emulates, or strives to equal or surpass.
     As Virgil rivaled Homer, Milton was the emulator of both.   --Bp. Warburton.
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  emulator
       n : someone who copies the words or behavior of another [syn: copycat,
            imitator, ape, aper]