ef·fi·cient /ɪˈfɪʃənt/
 (a.)有效的,效率高的;有能力的,能勝任的


 efficient
 有效


 ef·fi·cient a.  Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
    The efficient cause is the working cause.   --Wilson.
 Syn: -- Effective; effectual; competent; able; capable; material; potent.

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 Ef·fi·cient n. An efficient cause; a prime mover.
    God . . . moveth mere natural agents as an efficient only.   --Hooker.

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 efficient
      adj 1: being effective without wasting time or effort or expense;
             "an efficient production manager"; "efficient engines
             save gas" [ant: inefficient]
      2: able to accomplish a purpose; functioning effectively;
         "people who will do nothing unless they get something out
         of it for themselves are often highly effective
         persons..."-G.B.Shaw; "effective personnel"; "an efficient
         secretary"; "the efficient cause of the revolution" [syn:
         effective]