
efficiency基本信息
读法:英 [ɪ"fɪʃ(ə)nsɪ] 美 [ɪ"fɪʃənsi]
释义:
使用频率:★★
星级词汇:★★★
英英释义
Noun:
中英词源
efficiency 效率
ef-, 向外。-fic, 做,词源同fact, effect.
- 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).
词态变化
复数 efficiencies;
权威造句
- 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。
来自柯林斯例句
- 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。
来自柯林斯例句wWW.WentIYI.CoM
- 3. It was achieved with minimum fuss and maximum efficiency.
- 事情事半功倍地完成了。
来自柯林斯例句
- 4. It doesn"t take much to improve the energy efficiency of your home.
- 改善家庭能耗并非难事。
来自柯林斯例句
- 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。
来自柯林斯例句
近反义词
相似短语
单词分析
暂无,等待补充.
记忆方法
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).
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