Each subsystem is composed of two modules: application system faced to the user and data management system faced to the administrator.
每个应用的子系统都由两大模块组成：面向用户的应用系统和面向管理员的数据管理系统。
Each subsystem is composed of two modules: application system faced to the user and data management system faced to the administrator.
每个应用的子系统都由两大模块组成：面向用户的应用系统和面向管理员的数据管理系统。
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