本软件是简单实用的公共软件。考虑到系统的构架简单，且主要实现主要模块，提供清晰的设计框架，本文档在先做出概要设计前提下，然后在概要设计的基础上进行扩展和详细的描述，完成主要模块的详细设计。-The software is simple and practical public software. Taking into account the fr a mework of a simple system, and the main achievement of the main module, designed to provide a clear fr a mework to make this document a summary of the design first premise, and then outline the design on the basis of a detailed descr iption of the expansion and completion of the detailed design of the main module .