(of people) able to work well; capable （指人）能胜任的; 有能力的: an efficient secretary, teacher, administrator, etc 能干的秘书﹑ 教师﹑ 行政人员等 * He's efficient at his job. 他胜任工作. 
(esp of tools, machines, systems, etc) producing a satisfactory result without wasting time or energy （尤指工具, 机器, 系统等）有效力的: an efficient new filing system 有效的新归档系统.> efficiency / I5fIFnsI; I`fIFEnsI/ n [U] state or quality of being efficient 能力; 效力; 效能.
efficiently / -lI; -lI/ adv: get industry running more efficiently 使工业经营管理效率更高.