名词是efficiency，例如：
1、The institutions have realised they need to change their culture to improve efficiency and service.这些机构已经意识到需要改变他们的内部文化以提高效率、改进服务。
2、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。
