efficiency的形容词是efficient。

efficiency：n.效率;效能;功效;提高功效的方法;功率；

复数： efficiencies

扩展资料

It doesn't take much to improve the energy efficiency of your home.

改善家庭能耗并非难事。

The spa is the last word in luxury and efficiency.

这家矿泉疗养浴场极尽奢华，功效极高。

Administrative staff may be deskilled through increased automation and efficiency.

随着自动化程度和效率的不断提高，对管理人员的技能要求可能会大大降低。

It was achieved with minimum fuss and maximum efficiency.

事情事半功倍地完成了。