di·plo·ma /dəˈplomə/
  文憑,畢業證書
  Di·plo·ma n.; pl. Diplomas   A letter or writing, usually under seal, conferring some privilege, honor, or power; a document bearing record of a degree conferred by a literary society or educational institution.
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  diploma
       n : a document certifying the successful completion of a course
           of study [syn: sheepskin]