efficiency
/ɪˈfɪʃənsi/
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n. 效率；效能
- Replacing old light bulbs with LEDs can greatly improve a building's energy efficiency. 把舊燈泡換成LED燈，可以大幅提升建築物的能源效率。
其他意思
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n. 效率, 效能
Efficiency is the quality of being able to do a task successfully, without wasting time or energy.
- There are many ways to increase agricultural efficiency in the poorer areas of the world.
也出現在：
字根
fac, fact, fect, fic 做、製造
ef + fic + i + ency向外 + 做 + — + 名詞