目的：总结和分析软骨组织工程支架材料的研究进展、现状及其发展趋势。
OBJECTIVE: To summarize and analyze progress and current status of cartilage tissue engineering scaffolds and its developing trend.
本文主要描述了当前我国网络广告的现状及其收费模式，分析、介绍了收费模式的理论基础，并探讨网络广告及收费的发展趋势。
This paper describes the presence and Developing Foreground of our country's Network Advertising, its charge mode, and analyzing, introducing the charge mode's theory base.
针对我国居住区智能化系统的现状及其发展趋势，分析了新一代通信在居住小区中的应用。
Aiming at the current situation and development trend of residential district intelligent system in China, the application of new generation communication was analyzed.
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