profitless
  (a.)無利益的,無益的,浪費的
  Prof·it·less, a. Without profit; unprofitable.
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  profitless
       adj : without profit or reward; "let us have no part in profitless
             quarrels"- D.D.Eisenhower; "How weary, flat, stale, and
             unprofitable / Seem to me all the uses of this world"-
             Shakespeare [syn: unprofitable]