n.操作；运转；经营；行动；手术；运算；生效；（复）运筹学

The operation of this machine is simple. 这个机器的操作很简单。

I am skillful with computer operation. 我的计算机操作技术很好。

We hope we will finalise the operation before the transfer window closes. 我们希望在转会窗口关闭之前完成运转。

He calls himself the managing director but his company is just a Mickey Mouse operation that he runs from his own house. 他自称为总经理,但他的公司就是再他自己家里经营的一个微不足道的商号。

Today, in order to meet the market competition, modes of business operation have undergone rapid change. 今天,为适应市场竞争,经营方式正在迅速改变。

Actually, the whole D-Day operation was just round the corner. 事实上,整个登陆行动已近在眼前。

Life by the great dream, learn and change, due to the successful operation! 人生因梦想而伟大,因学习而改变,因行动而成功!

The surgeon has performed the operation. 外科医生做了手术。

Operation is conditional to the formulation. 运算应符合公式。

In an addition operation, a number or quantity added to the augend. 在加法运算中，加到被加数上的数或量。

The Department put into operation major reforms to the General Skilled Migration (GSM) programme with effect from 1 September 2007. 我局在技术移民审理方面做了很大的改革，从2007年9月1日生效。

美国人习惯用the operation of the school/theatre等表达方式，而英国人喜欢用conduct，management或running等词去代替operation；

当operation可表示为“外科手术”。后面常接on/upon和表示人或身体某部分的单词，如an operation (up)on me。也可接for和病名，例如an operation for the detachment of the retina（视网膜脱落手术）。

operation作“操作,运转,经营”解时,是不可数名词,主要用于美式英语中。

operation作“手术”“(军事)行动,活动”“运算”解时,是可数名词。

operation在句中可用作定语修饰其他名词。