这个图既没有欧拉回路，也没有欧拉路径。因为有超过两个顶点的度数为奇数。
Neither Eular circuit nor Eular path exists in this graph, since there are more than two vertices with odd degree.
这个图既没有欧拉回路，也没有欧拉路径。因为有超过两个顶点的度数为奇数。
Neither Eular circuit nor Eular path exists in this graph, since there are more than two vertices with odd degree.
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