di·plo·ma·tist /dəˈplomətɪst/
  外交能手
  Di·plo·ma·tist n.  A person employed in, or skilled in, diplomacy; a diplomat.
     In ability, Avaux had no superior among the numerous able diplomatists whom his country then possessed.   --Macaulay.
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  diplomatist
       n : an official engaged in international negotiations [syn: diplomat]