There are two fields in topological graph theory: one is the study of the properties of graph embedding.

本文研究属第一个方面，即研究图的嵌入的最大亏格问题。

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There are two fields in topological graph theory: one is the study of the properties of graph embedding.

本文研究属第一个方面，即研究图的嵌入的最大亏格问题。

youdao