After the code review, I'll walk you through the process of downloading the sample code and the ECS libraries so that you can execute the example application on your own machine if you wish.
回顾完代码后，我将引导您完成下载示例代码和ecs库的过程，这样如果愿意，您就可以在自己的计算机上执行这个示例应用程序。
Before you start importing and running the actual code, let me walk you through a little bit of theory.
在您开始导入并运行实际的代码前，让我来为您逐步地讲述一点点理论。
Finally, I'll provide one such example and walk you through the source code.
最后，我将提供一个这样的例子并会带您亲历它的源代码。
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