ex·tra·ne·ous /ɛkˈstreniəs/
 (a.)無關係的,外來的
 Ex·tra·ne·ous a.  Not belonging to, or dependent upon, a thing; without or beyond a thing; not essential or intrinsic; foreign; as, to separate gold from extraneous matter.
    Nothing is admitted extraneous from the indictment.   --Landor.
 -- Ex*tra*ne*ous*ly, adv.
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 extraneous
      adj 1: not pertinent to the matter under consideration; "an issue
             extraneous to the debate"; "the price was immaterial";
             "mentioned several impertinent facts before finally
             coming to the point" [syn: immaterial, impertinent,
              orthogonal]
      2: not essential; "the ballet struck me as extraneous and
         somewhat out of keeping with the rest of the play"
      3: not belonging to that in which it is contained; introduced
         from an outside source; "water free of extraneous matter";
         "foreign particles in milk" [syn: foreign]
      4: coming from the outside; "extraneous light in the camera
         spoiled the photograph"; "relying upon an extraneous
         income"; "disdaining outside pressure groups" [syn: external,
          outside]