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Efficiency is the quality of being able to do a task successfully, without wasting time or energy.
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。
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。
雅思英语词汇收录8785个雅思英语词条，基本涵盖了全部常用雅思英语词汇的翻译及释义，是英语学习的有利工具。