docs: update readme

Author: zhufuyi

README.md

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-**Sponge** is a powerful and easy-to-use `Go` development framework. Its core concept is to reverse-generate modular code by parsing `SQL`, `Protobuf`, and `JSON` files. These modular components can be flexibly combined into various types of complete backend services.
+**Sponge** is a powerful and easy-to-use Go development framework. Its core philosophy is **"Definition is Code"**, means generating modular Go code by parsing `SQL`, `Protobuf`, and `JSON` files. These code modules can be flexibly combined to build various types of complete backend services.
 
-Sponge provides a one-stop project development solution. It covers code generation, development, testing, API documentation, and deployment, enabling developers to effortlessly build stable, reliable, and high-performance backend service systems (including RESTful API, gRPC, HTTP+gRPC, and gRPC Gateway, etc.) with a low-code approach.
+Sponge provides a one-stop project development solution that covers code generation, development, testing, API documentation, and deployment. It helps developers easily build stable, reliable, and high-performance backend services (including RESTful APIs, gRPC, HTTP+gRPC, gRPC Gateway, etc.) in a "low-code" approach, greatly improve the efficiency and quality of project development.
 
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assets/readme-cn.md

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-**sponge** 是一个强大且易用的 `Go` 开发框架，其核心理念是通过解析 `SQL`、`Protobuf`、`JSON` 文件逆向生成模块化的代码，这些模块代码可灵活组合成多种类型的完整后端服务。
+**sponge** 是一个强大且易用的 Go 开发框架，其核心理念是**定义即代码**(Definition is Code)，通过解析 `SQL`、`Protobuf`、`JSON` 文件逆向生成模块化的 Go 代码，这些模块代码可灵活组合成多种类型的完整后端服务。
 
-sponge 提供一站式项目开发解决方案，涵盖代码生成、开发、测试、API 文档和部署等，帮助开发者以"低代码"方式轻松构建稳定可靠的高性能后端服务体系(包括 RESTful API、gRPC、HTTP+gRPC、gRPC Gateway 等)。
+sponge 提供一站式项目开发解决方案，涵盖代码生成、开发、测试、API 文档和部署等，帮助开发者以"低代码"方式轻松构建稳定可靠的高性能后端服务(包括 RESTful API、gRPC、HTTP+gRPC、gRPC Gateway 等)，大幅提升项目开发的效率与质量。
 
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