update README

README.md

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 English | [简体中文](https://github.com/yjh0410/RT-ODLab/blob/main/README_CN.md)
 
+We are trying to build our real-time general target detection code base based on the core concepts of YOLO. We have reproduced most of the YOLO series. In addition, we have also written an introductory tutorial on YOLO. We hope that by learning YOLO, a very popular general target detection framework, beginners can master the basic knowledge necessary to study general target detection. 
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+If you are interested in our book, you can purchase it on e-commerce platforms such as Taobao and JD.com in China.
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+![image](./img_files/yolo_tutorial.png)
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 ## Requirements
 - We recommend you to use Anaconda to create a conda environment:
 ```Shell

README_CN.md

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 # 实时通用目标检测
 
+我们在尝试基于YOLO的核心理念来构建我们的实时通用目标检测代码库。我们复现了绝大部分的YOLO系列。另外，我们还写了一本YOLO的入门教程，我们希望通过学习YOLO这一十分受欢迎的通用目标检测框架可以让初学者掌握研究通用目标检测所必须的基础知识。
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+如果你对我们出版的图书很感兴趣，可以在中国的淘宝和京东等电商平台去购买。
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+![image](./img_files/yolo_tutorial.png)
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 ## 配置运行环境
 - 首先，我们建议使用Anaconda来创建一个conda的虚拟环境
 ```Shell