设计了五种角色身份可登陆系统，不同级别的用户对各功能模块的使用权限不同。

Five user roles that have different authorities in different modules were given in the system.

youdao

设计了五种角色身份可登陆系统，不同级别的用户对各功能模块的使用权限不同。

Five user roles that have different authorities in different modules were given in the system.

youdao