English主要词典
efficiency
Universal Words
noun
1 [U] the quality of doing sth well with no waste of time or money:
improvements in efficiency at the factory * I was impressed by the efficiency with which she handled the crisis.
2 (efficiencies) [pl.] ways of wasting less time and money or of saving time or money:
We are looking at our business to see where savings and efficiencies can be made.
3 [U] (technical) the relationship between the amount of energy that goes into a machine or an engine, and the amount that it produces