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新东方-柯林斯雅思备考词典
efficiency
英 [ɪˈfɪʃənsi]
[NOUN]
1. [U 不可数名词] 效率
Efficiency is the quality of being able to do a task successfully, without wasting time or energy.
双语例句
例：There are many ways to increase agricultural efficiency in the poorer areas of the world.
有许多提高世界较贫困地区农业效能的方法。
例：Refrigerators have improved energy efficiency by a third in 30 years.
冰箱的能源效率在30年中提高了三分之一。