近年来，为了保障网络教学质量，许多人士对网络教学系统的各个组成部分进行了评价探讨。
In recent years, in order to ensure the network teaching quality, there has been much evaluation about each parts of the network teaching system.
因此，无论从网络质量的保障还是市场优势的长期保持来看，进行EGPRS优化的研究是必要的。
Therefore, no matter from the quality of network security or market advantages, to maintain the long-term EGPRS optimization study is necessary.
使用户的产品质量和市场效应起到强有力的保障，经销和服务网络遍布全国。
So that the user's product quality and market effects play a strong security, distribution and service network all over the country.
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