But there is strangely little discussion of the intellectual underpinnings of Copernicus's system of the world, and of the meticulous observations that eventually convinced him that Ptolemy was wrong.

但奇怪的是，该书很少讨论哥白尼的世界体系下知识支撑，也少有提及让哥白尼最终确信托勒密理论是错误的一丝不苟的观察。

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This article closes with a discussion of some of the observations we made and lessons we learned while working on the project.

这篇文章的结束部分我们来对我们在项目中所观察到的进行一个讨论，并希望能够从我们在这个项目的工作中学习到一些经验和教训。

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