Although it might seem counterintuitive, companies do make money selling open source products, as this book explains. Their profits are based on a few different business models.
尽管这听起来可能有违直觉，正如这本书解释的，公司确实靠出售公开源码产品赚钱。
As the author explains, this is neither a travel nor a history book, or even a piece of reportage.
如作者解释，这既不是一本游记，也不是一本历史书，甚至也不是报告文学。
This paper analyses the natural geographical mistakes of a representative work which explains Records of Mountains and Rivers as a geographical book about the world and criticises its viewpoint.
本文针对把《山海经》说成是世界地理书的一篇代表作，剖析了它在自然地理学方面的错误，批驳了这种观点。
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