Four years later, he had to have another operation.

VOA: special.2010.02.07

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

This means doctors need to perform another operation.

VOA: special.2009.02.03

Doctors had discharged the athlete, who had been due to return to hospital for another operation.

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But after he complained of acute abdominal pain, his stay at the hospital was extended amid reports of another operation.

BBC: Bollywood's Amitabh Bachchan back home after surgery

She said after the initial transplant operation, a further CT scan returned abnormal results and so another operation was carried out.

BBC: Addenbrooke's Hospital