productiveness
 生產


 Pro·duc·tive a.
 1. Having the quality or power of producing; yielding or furnishing results; as, productive soil; productive enterprises; productive labor, that which increases the number or amount of products.
 2. Bringing into being; causing to exist; producing; originative; as, an age productive of great men; a spirit productive of heroic achievements.
    And kindle with thy own productive fire.   --Dryden.
    This is turning nobility into a principle of virtue, and making it productive of merit.   --Spectator.
 3. Producing, or able to produce, in large measure; fertile; profitable.
 -- Pro*duc*tive*ly, adv. -- Pro*duc*tive*ness, n.

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 productiveness
      n : the quality of being productive or having the power to
          produce [syn: productivity] [ant: unproductiveness]