efficiency

英式英标[ɪ\'fɪʃənsi]
美式音标[ɪ\'fɪʃ(ə)nsɪ]

n. 效率；效能；功效

中文词源

efficiency 效率

ef-, 向外。-fic, 做，词源同fact, effect.

英文词源

efficiency (n.): 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).

中文解释

1. ef- "out" + fic- => fici- => effici-. 在这里取 out 的引申义：完成、结束(finish, end)之意。2. meaning: 事情做完了，事情做结束了. => work out, accomplish.3. => 引申为：事情做完、做结束后的效果。4. effici- + -ent. => 有效的，有效果的，生效的。=> 高效的，效率高的，有本事的。5. efficient => efficiency (efficient + -cy).

实用例句

1. 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。

2. Revenues from "green taxes" could then be channelled back into energy efficiency.: 从“绿色税收”得来的收入便可回过头来用于提高能效。

3. It was achieved with minimum fuss and maximum efficiency.: 事情事半功倍地完成了。

4. It doesn't take much to improve the energy efficiency of your home.: 改善家庭能耗并非难事。

5. Defrost the fridge regularly so that it works at maximum efficiency.: 定期给冰箱除霜，以便它能发挥其最高效率。

efficiency

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