mastership
  主人身分,熟練
  Mas·ter·ship, n.
  1. The state or office of a master.
  2. Mastery; dominion; superior skill; superiority.
     Where noble youths for mastership should strive.   --Driden.
  3. Chief work; masterpiece. [Obs.]
  4. An ironical title of respect.
     How now, seignior Launce! what news with your mastership?   --Shak.
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  mastership
       n : the position of master