n.效率；效能；功效
inefficiency───n.效率低；无效率；无能
efficiently───adv.有效地；效率高地（efficient的副词形式）
sufficiency───n.足量，充足；自满
deficiency───n.缺陷，缺点；缺乏；不足的数额
efficient───adj.有效率的；有能力的；生效的
efficiencies───n.效率（efficiency的复数）
proficiency───n.精通，熟练
sufficience───充分性
-efficient───adj.有效率的；有能力的；生效的
Defrost the fridge regularly so that it works at maximum efficiency.───定期给冰箱除霜能取得最大效率。
It was achieved with minimum fuss and maximum efficiency.───它以最少的慌乱和最高的效率被做到了。
She arranged everything with her customary efficiency.───她以她特有的高效率把一切都已安排妥当。
In India, banks have launched programs for small energy efficiency projects in certain industries, which are now ready to be scaled up.───在印度，银行在某些产业启动了小型能效项目规划，现在正准备扩大规模。
In addition to increasing efficiency of energy use in addition, has no other way to avoid energy prices continued to rise.───除了提高能源使用效率之外，已经没有其它办法能避免能源价格持续走高。
The great majority of human beings today look at life as of it were a business. Their basic philosophy is one of competition and efficiency.───现代大部分人都这么看待人生，他们的基本观点就是竞争和效率。
Experimental results show that this approach can remarkably improve the acquisition efficiency, correctness and validity of constraints.───实践证明，该方法可以显著地提高约束信息的获取效率、正确性和有效性。
The CFB boiler has been generally approved as environmental boiler with high efficiency and low pollution all over the word .───循环流化床锅炉作为高效低污染的环保型锅炉得到世界范围的普遍认可。
For efficiency the shape of the roof should be designed in such a way that it provides as large an evaporation area as possible.───从效率考虑，屋顶形状应这样来设计，即它可提供尽可能大的蒸发面积。