in·ci·den·tal·ly /-ˈdɛntḷi, ||ˈdɛntli/
 (ad.)附隨地,偶然,順便
 In·ci·den·tal a. Happening, as an occasional event, without regularity; coming without design; casual; accidental; hence, not of prime concern; subordinate; collateral; as, an incidental conversation; an incidental occurrence; incidental expenses.
    By some, religious duties . . . appear to be regarded . . . as an incidental business.   --Rogers.
 Syn: -- Accidental; casual; fortuitous; contingent; chance; collateral. See Accidental.
 -- In*ci*den*tal*ly, adv. -- In*ci*den*tal*ness, n.
    I treat either or incidentally of colors.   --Boyle.
 incidentally
      adv 1: introducing a different topic; "by the way, I won't go to
             the party" [syn: by the way, by the bye]
      2: in an incidental manner; "these magnificent achievements
         were only incidentally influenced by Oriental models"
         [syn: accidentally, by chance]
      3: by the way; "apropos, can you lend me some money for the
         weekend?" [syn: apropos]