Then the thesis analyzes the work principles and basic characteristic of VRML, expatiates work pattern of VRML and conception pattern of VRML browser in detail.
其次，本文分析了VRML的工作原理及基本特性，并详细地阐述了VRML的工作模式和VRML浏览器的概念模式。
The paper firstly introduces the origin, conception and prerequisites of virtual network operation, and mentions virtual network operation pattern too.
首先给出虚拟电信运营的来源、概念和前提条件，进而引出对虚拟电信运营模式的讨论；
On this foundation, it proposed language some preliminary conception of the pattern of task-based English learning.
在此基础上，提出了任务型学习模式的一些初步构想。
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