名詞 efficiency:

1. the ratio of the output to the input of any system
2. skillfulness in avoiding wasted time and effort

1. We were most impressed with/by your efficiency.
   你的工作效率很高，我們極為欽佩。
2. The two companies consolidated for greater efficiency.
   這兩家公司已合并以提高效率。
3. Such action can be justified on the grounds of greater efficiency.
   以提高功效為依據(jù)可以證明采取這種措施是正確的。
4. Such considerations are secondary to our main aim of improving efficiency.
   對(duì)於我們提高效率的主要目的來(lái)說(shuō)，這些想法都是次要的。
5. I had a chance to impress her with my efficiency and I muffed it up.
   我本來(lái)有機(jī)會(huì)使她了解我的辦事效率，但是我錯(cuò)過(guò)了這個(gè)機(jī)會(huì)。
6. His illness has impaired his efficiency.
   生病降低了他的效率。
7. Their labor efficiency is very high.
   他們的工作效率很高。
8. We must improve our efficiency as soon as possible.
   我們必須盡快地提高工作效率。

ef.fi.cien.cy

n.（名詞）
【復(fù)數(shù)】 ef.fi.cien.cies 縮寫 eff.

The quality or property of being efficient.
效能：有功效的特征或性質(zhì)
The degree to which this quality is exercised:
功效：這種特征所能達(dá)到的程度：
例句：
The program was implemented with great efficiency and speed.
項(xiàng)目以極大的效率和速度被實(shí)施

The ratio of the effective or useful output to the total input in any system.
效率：在某一系統(tǒng)中有效的或有用的產(chǎn)出與總投入的比率
The ratio of the energy delivered by a machine to the energy supplied for its operation.
功率：機(jī)器做一定功所發(fā)出的能量與其總能量的比
An efficiency apartment.
公寓小套間