efficiency是什么意思（efficiency的用法）

大家好，知识小编来为大家讲解下。efficiency是什么意思，efficiency的用法很多人还不知道，现在让我们一起来看看吧！

一、efficiency是什么意思

1、efficiency 效率

2、ef-, 向外。-fic, 做，词源同fact, effect.

二、efficiency的用法

1、efficiency (n.)

2、1590s, "power to accomplish something," from Latin efficientia "efficient power; efficiency; influence" (from efficientem; see efficient) + -cy. In mechanics, "ratio of useful work done to energy expended," from 1858. Attested from 1952 as short for efficiency apartment (itself from 1920).

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