He has two different books 他有两本不一样的书
他有两本书。
Ron is best known for being the on-site XP coach on the first XP project in 1996, in addition he has two books: Extreme Programming Adventures in C# and Extreme Programming Installed.
Ron最为人们熟知的,是他曾在1996年的第一个XP项目中担任现场XP教练,另外他还写过两本书:《 Extreme Programming Adventures in C#》和《 极限编程实施》。
他有二百本书。
He also has two books about investing that we'll talk about.
他也写过两本投资方面的著作,我们会谈到的
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