ex·pa·ti·ate /ɛkˈspeʃiˌet/
  (vi.)詳述,細說
  Ex·pa·ti·ate v. i. [imp. & p. p. Expatiated p. pr. & vb. n. Expariating ]
  1. To range at large, or without restraint.
     Bids his free soul expatiate in the skies.   --Pope.
  2. To enlarge in discourse or writing; to be copious in argument or discussion; to descant.
     He expatiated on the inconveniences of trade.   --Addison.
  Ex·pa·ti·ate, v. t. To expand; to spread; to extend; to diffuse; to broaden.
     Afford art an ample field in which to expatiate itself.   --Dryden.
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  expatiate
       v : add details, as to an account or idea; clarify the meaning
           of and discourse in a learned way, usually in writing;
           "She elaborated on the main ideas in her dissertation"
           [syn: elaborate, lucubrate, exposit, enlarge, flesh
           out, expand, expound, dilate] [ant: abridge]