... 塞翁失马,焉知非福Misfortune may be an actual blessing. 升级换代updating and upgrading (of products) 四十不惑Life begins at forty. ...
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进级换代updating and upgrading（of products） 文韬武略military expertise；military strategy ..
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upgrading and updating 升级换代 ; 进级换代
updating and upgrading andshy 升级换代
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。
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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