However, the category of traditional encyclopedias and reference material has changed.
然而，传统百科全书和参考材料的范畴业已改变。
Network productive forces is a new category, it forms the material foundation of network economy.
网络生产力是一个全新的范畴，它构成了网络经济的物质基础。
Network productive forces is a new category, it forms the material foundation of network economy.
网络生产力是一个全新的范畴，它构成了网络经济的物质基础。
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