tsar /ˈzɑr, ˈ(t)sɑr/
  沙皇
  Tsar n. The title of the emperor of Russia. See Czar.
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  czar n.  A king; a chief; the title of the emperor of Russia. [Written also tsar and tzar.]
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  tsar
       n : a male monarch or emperor (especially of Russia prior to
           1917) [syn: czar, tzar]