[] the ability to do sth well with no waste of time or money 效率◆improvements in efficiency at the factory 工厂效率的提高◆I was impressed by the speed and efficiency with which my order was processed. 他们处理我的订单的速度和效率给我留下了深刻的印象。◆The increase in profits was mainly due to efficiency gains. 利润的增加主要归因於效率的提升。⨁to achieve / boost / improve / increase / maximize efficiency 实现／促进／改进／提高／最大限度地提高效率⨁efficiency gains / savings 效率提升／增效节约⨁an efficiency drive / programme 效率导向／方案
efficiencies [] ways of wasting less time and money or of saving time and money 提高效率的方法◆We are looking at our business to see where efficiencies can be made. 我们正在研究我们的业务，看看是否有可以提高效率的地方。
() [] the relationship between the amount of energy that goes into a machine or an engine, and the amount that it produces 效率；功率◆The generator is running at only 40% efficiency. 这台发动机的运行效率只有 40%。