needlessly
  (ad.)不必要地;多餘地
  Nee·dless a.
  1. Having no need. [Obs.]
     Weeping into the needless stream.   --Shak.
  2. Not wanted; unnecessary; not requisite; as, needless labor; needless expenses.
  3. Without sufficient cause; groundless; causeless. “Needless jealousy.”
  -- Need*less*ly, adv. -- Need*less*ness, n.
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  needlessly
       adv : without need; "it would needlessly bring badness into the
             world"