hom·i·let·ics /-tɪks/
  說教術
  Hom·i·let·ics n.  The art of preaching; that branch of theology which treats of homilies or sermons, and the best method of preparing and delivering them.
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  homiletics
       n 1: the branch of theology that deals with sermons and homilies
       2: the art of preaching