di·gres·sive /-ˈgrɛsɪv/
  (a.)枝節的;離題的
  Di·gress·ive a.  Departing from the main subject; partaking of the nature of digression.
  ◄ ►
  digressive
       adj 1: of superficial relevance if any; "a digressive allusion to
              the day of the week"; "a tangential remark" [syn: tangential]
       2: (of e.g. speech and writing) tending to depart from the main
          point or cover a wide range of subjects; "amusingly
          digressive with satirical thrusts at women's fashions
          among other things"; "a rambling discursive book"; "his
          excursive remarks"; "a rambling speech about this and
          that" [syn: discursive, excursive, rambling]