If you want knowledge, you must take part in the practice of changing reality.
你要有知识， 你就得参加变革现实的实践。
My dream is changing and changing, all about the moon — a large of knowledge.
我的梦想是改变，改变，所有关于月球——很多的知识。
In the time of knowledge economy, traditional library is changing into digital library.
知识经济时代，传统图书馆正向数字图书馆演变。
In the time of knowledge economy, traditional library is changing into digital library.
知识经济时代，传统图书馆正向数字图书馆演变。
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