1N-UNCOUNT 效率;效能;功效Efficiency is the quality of being able to do a task successfully, without wasting time or energy. 效率;效能;功效
There are many ways to increase agricultural efficiency in the poorer areas of the world.
有很多方法能够提高世界贫困地区的农业效率。
...energy efficiency.
能效
2N-UNCOUNT (物理学、工程学中的)效率,功率 In physics and engineering, efficiency is the ratio between the amount of energy a machine needs to make it work, and the amount it produces. (物理学、工程学中的)效率,功率 [technical]