change·ful /ˈʧenʤfəl/
  (a.)易變的,不安定的,富于變化的
  Change·ful a. Full of change; mutable; inconstant; fickle; uncertain.
     His course had been changeful.   --Motley.
  -- Change*ful*ly, adv. -- Change*ful*ness, n.
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  changeful
       adj : such that alteration is possible; having a marked tendency
             to change; "changeable behavior"; "changeable moods";
             "changeable prices" [syn: changeable] [ant: unchangeable]