decorously
  (ad.)有禮地;端正地
  Dec·or·ous a.  Suitable to a character, or to the time, place, and occasion; marked with decorum; becoming; proper; seemly; befitting; as, a decorous speech; decorous behavior; a decorous dress for a judge.
     A decorous pretext the war.   --Motley.
  -- De*co*rous*ly, adv. -- De*co*rous*ness, n.
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  decorously
       adv : in a proper and decorous manner; "he pretended to be pleased
             and applauded decorously" [ant: indecorously]