同时假设网络结构设计合理，Web服务器在D MZ区域中得到隔离，它与应用服务器交互，应用服务器再与数据库服务器通讯。

Also, given a reasonable network infrastructure our web servers will be isolated in the DMZ and will have to access some application server which, in turn, will communicate with the DB.

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在系统设计阶段，本文主要对系统的网络结构设计，子系统的划分，人机交互部分设计，数据库的设计进行了论述。

In the system design stage, the author mainly discusses the design of sub-system, person-machine mutual design and database design.

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在此基础上，对作业联盟的集成方案、网络结构、软件结构、数据库架构方面提出相应的解决方案。

On this base, this paper put forward the relevant solving ways for integration projects, network structure, software structure and database frameworks of production and operation alliance.

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