It is the updating and upgrading of tool that we stress in this thesis.

工具的更新、升级引起的变革，成为本文比较分析的重点。

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Through updating and upgrading of the CERNET and digitized transformation for the satellite TV network, the transmission terrace has been built in our country.

通过中国教育和科研计算机网的升级提速，以及卫星电视教育网的数字化改造，构建了我国现代远程教育专业平台。

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