docs(README): 更新简介

Author: zjZSTU

README.md

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 [中文版本（Chinese version）](./README.zh-CN.md)
 
-Convolutional neural network based on numpy, modular design guarantees easy implementation of the model, which is suitable for the introduction of junior researchers in deep learning.
+Implementation of deep learning based on numpy, modular design guarantees easy implementation of the model, which is suitable for the introduction of junior researchers in deep learning.
 
 *A PyTorch example is also included.*
 

README.zh-CN.md

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 # 基于numpy的深度学习库
 
-基于`numpy`实现的卷积神经网络，模块化设计保证模型的轻松实现，适用于深度学习初级研究人员的入门
+基于`numpy`的深度学习实现，模块化设计保证模型的轻松实现，适用于深度学习初级研究人员的入门
 
 *同时附带了PyTorch示例*