There are four stages in the process of human civilization progress, which are the tool age, the agriculture age, the industry age and the knowledge age.
人类文明进程可以分为四个时代：工具时代、农业时代、工业时代和知识时代。
When human being enters the 21 century, the social economic gradually shifts from the industrial age to the knowledge age.
人类进入21世纪，社会经济正逐步从工业经济时代迈向知识经济时代。
In the knowledge age, as a new management thought and approach, knowledge management is very necessary in library management.
知识经济时代，知识管理作为一种新的管理思想和方式，在图书馆实行非常必要。
In the knowledge age, as a new management thought and approach, knowledge management is very necessary in library management.
知识经济时代，知识管理作为一种新的管理思想和方式，在图书馆实行非常必要。
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