传统的服务器程序一般运行在大型的拥有高级操作系统的服务器的计算机上，这样服务器软件需要强大的硬件和系统软件支持。

Traditional serve applications usually work in a mainframe computer with an advanced operating system. Such application needs strong support from hardware and software.

youdao

高级一点的可能会使用现有的操作系统登录身份进行身份验证。

A more advanced one might validate identity using an existing operating-system login identity.

youdao

这个框架在象字符串这样的基本类型（接近操作系统的窗口小部件希望使用这些基本类型）和更高级的模型对象（您的代码更愿意使用这些对象）之间进行映射。

This framework maps between primitives like strings that the widgets close to the operating system expect and the higher-level model objects with which your code prefers to work.

youdao