con·trac·tor /||ˈkɑnˌtræktɚ/
 立契約的人,承包商
 con·trac·tor /ˈkɑnˌtræktɚ, kənˈ/ 名詞
 收縮肌,收縮器,牴觸因素
 Con·tract·or n.  One who contracts; one of the parties to a bargain; one who covenants to do anything for another; specifically, one who contracts to perform work on a rather large scale, at a certain price or rate, as in building houses or making a railroad.
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 contractor
      n 1: someone (a person or firm) who contracts to build things
      2: the bridge player in contract bridge who wins the bidding
         and can declare which suit is to be trumps [syn: declarer]
      3: (law) a party to a contract
      4: a bodily organ that contracts [syn: contractile organ]