本文首先简要地回顾了国际上现有三类通信网的实际运用情况，分析推动通信网结构革新的主要因素。
The paper begins with a brief review on the existing communication networks actually in operation. Then, it explains the motive forces to promote the reform of present communication network structure.
在这个报告中我会首先简要地介绍一下这方面研究的进展，然后主要介绍一些我个人的研究结果。
This talk contains three parts. In the first part, we provide a brief introduction of current research on photonic lattices and then focus on the work I have done with my collaborators.
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