In a multi-tier system, users usually initiate long conversations (or application transactions).
在一个多层系统中，用户通常会发起长对话(或应用程序事务)。
It is more importance to research on the developing technology of the multi-tier system for improving the level of the applied software oriented enterprise.
因此对多层体系结构系统开发技术的研究对提高我国企业级应用软件开发水平具有重要意义。
Through discussion, we have found a multi-tier architecture based on J2EE and MVC pattern which provides a good mechanism for a telescopic, flexible and easy maintaining business system.
通过讨论可以发现：基于J2EE和MVC模式的多层体系结构为搭建具有可伸缩性、灵活性、易维护性的商务系统提供了良好的机制。
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