harm·ful /ˈhɑrmfəl/
  (a.)有害的,傷害的
  Harm·ful a. Full of harm; injurious; hurtful; mischievous. “ Most harmful hazards.”
  --Harm*ful*ly, adv. -- Harm*ful*ness, n.
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  harmful
       adj 1: injurious to physical or mental health; "noxious chemical
              wastes"; "noxious ideas" [syn: noxious] [ant: innocuous]
       2: able or likely to do harm
       3: causing or capable of causing harm; "too much sun is harmful
          to the skin"; "harmful effects of smoking" [ant: harmless]
       4: constituting a disadvantage [syn: disadvantageous] [ant: advantageous]
       5: contrary to your interests or welfare; "adverse
          circumstances"; "made a place for themselves under the
          most untoward conditions" [syn: adverse, inauspicious,
           untoward]
       6: tending to cause great harm [syn: evil, injurious]