基本解释[能源科學技術]標準坐標紙英汉例句雙語例句In this paper, we study the condition which makes the fundamental group of graph have every positive integer as the index of some normal subgroup.本文主要研究圖的基本群的正槼子群的指數何時成爲任意正整數的條件。normal graph paper更多例句专业释义能源科學技術標準坐標紙