I underwent an operation on my groin once.

我的腹股沟部位曾动过一次手术。

《柯林斯英汉双解大词典》

I had the operation on the recommendation of my doctor.

我根据医生的建议做了手术。

《牛津词典》

He checked into a top London clinic yesterday for an operation on his knee.

他昨天住进了伦敦一家最高级的诊所，准备做膝部手术。

《牛津词典》

The Nobel committee said the book "is like a surgical operation on one of the most delicate parts of the social body."

VOA: special.2009.03.13

When I reflect on the first couple of years of Baidu's operation, I think there are three things that's very critical.

当我回想百度最初的那几年，有三件事是非常重要的。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

So I put my head down and focused on operation technology, focused on the user's experience, and I delivered.

我选择脚踏实地工作，专注于公司的运营，专注于提升用户体验，这一切我都做到了。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

She was given the organ in a simultaneous operation on both women involving two surgeons.

BBC: News | UK | Comedian's daughter saved by kidney transplant

Surgeons have successfully completed a heart bypass operation on a patient who was left awake throughout.

BBC: Heart bypass - with local anaesthetic

The two oil-gluggers' recent co-operation on energy was, after all, as unusual as it was tentative.

ECONOMIST: India and China