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单词 efficiency
释义 efficiency
 /i fish"euhn see/,  n.  ,  pl.   efficiencies.
  1. the state or quality of being efficient; competency in performance.
  2. accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort: The assembly line increased industry's efficiency.
  3. the ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.
  4. See efficiency apartment.
 [1585-95; < L efficientia, equiv. to efficient- (see EFFICIENT) + -ia -Y3]
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