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。
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。
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