Its theory support is matter-element and extension set, and its logical cell is matter-element.
它的理论支柱是物元理论和可拓集合理论，其逻辑细胞则是物元。
Its theoretical pillars are the theory of matter-element and the theory of extension set.
其理论支柱是物元理论和可拓集合。
The extension set is one of the three mainstays of extension theory.
可拓集合是可拓论的三大支柱之一。
The extension set is one of the three mainstays of extension theory.
可拓集合是可拓论的三大支柱之一。
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