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》

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》

In desperation, Mrs. Jones submitted to an operation on her right knee to relieve the pain.

绝望中，琼斯夫人不得已接受了一次她右膝的手术以减轻疼痛。

《柯林斯英汉双解大词典》

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