efficiencies

英 [ɪˈfɪʃənsiz]

美 [ɪˈfɪʃənsiz]

n.  效率; 效能; 功效; 提高功效的方法; 功率
efficiency的复数

柯林斯词典

• N-UNCOUNT 效率;效能;功效
  Efficiencyis the quality of being able to do a task successfully, without wasting time or energy.
  1. 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。
  2. ...energy efficiency.
     能效
• （物理学、工程学中的）效率，功率
  In physics and engineering,efficiencyis the ratio between the amount of energy a machine needs to make it work, and the amount it produces.

双语例句