一个介绍 LangChain 功能模块的架构图，配有视频讲解，帮助用户更好地理解 LangChain 的各个模块及其功能。
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文配视频：一图带你了解 LangChain 的功能模块给 LangChain 官方做了一个模块架构图，原推 还比较受欢迎所以录了一个视频的讲解，想分享给我们国内玩 LangChain 的同学。
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