He had a minor operation to remove a cyst.

他做了一个切除了囊肿的小手术。

《柯林斯英汉双解大词典》

The operation to transplant a kidney is now fairly routine.

移植肾脏的手术如今相当常见。

《柯林斯英汉双解大词典》

He had an operation to remove an obstruction in his throat.

他做了手术，取出喉头的阻塞物。

《牛津词典》

For example,in nineteen eighty-seven, he led a team of seventy doctors and nurses in an operation to separate two babies joined at the head.

VOA: special.2009.09.04

Why does agreement to a certain procedure, even a fair procedure, justify whatever result flows from the operation of that procedure?

为什么只要经过了特定程序，公平的程序，不管任何结果都可以视为正当呢？

耶鲁公开课 - 公正课程节选

A low-level language, we used to call this assembly programming, you're down at the level of, your primitives are literally moving pieces of data from one location of memory to another, through a very simple operation.

一个低级的语言，我们曾经将其称为假设编程，你们只是处于用基本要素，把一些数据碎片,从记忆存储器的一个地方，通过简单的操作来转到另外一个地方。

麻省理工公开课 - 计算机科学及编程导论课程节选

Four of the kidnappers were killed in the operation to rescue the boy, media reports say.

BBC: Karachi security - file photo from 2002

Ten people have been arrested as part of a nationwide operation to target sham marriages.

BBC: Sham marriage raids: Ten people arrested

It said the military estimated the operation to capture Grozny might take three to four days.

BBC: News Online