ora·tion /əˈreʃən, ɔ-/
  演說,致辭,敘述法
  O·ra·tion, v. i. To deliver an oration.
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  O·ra·tion n. An elaborate discourse, delivered in public, treating an important subject in a formal and dignified manner; especially, a discourse having reference to some special occasion, as a funeral, an anniversary, a celebration, or the like; -- distinguished from an argument in court, a popular harangue, a sermon, a lecture, etc.; as, Webster's oration at Bunker Hill.
     The lord archbishop . . . made a long oration.   --Bacon.
  Syn: -- Address; speech. See Harangue.
  oration
       n : an instance of oratory; "he delivered an oration on the
           decline of family values"