所有质料的实践原理皆属一类并归属于自爱或私有的快乐的原理。
All material practical principles as such are of one and the same kind and come under the general principle of self-love or private happiness.
对可获得性论的图书馆原理作了总结，揭示出图书馆五条实践原理。
The library principle of the view of procurability is summarized and five library practice principles are revealed.
从知识仓库的实践原理出发， 利用XML技术和语言的强大功能， 实现了常用机件设计知识仓库的构建。
Based on the practicing principle of knowledge warehouse, the building of common-part's design knowledge warehouse was realized by using the great function of XML technique.
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