In a k-coloring of a uniquely k-colorable graph, the subgraph induced by the union of any two color classes is connected.是什么意思_In a k-coloring of a uniquely k-colorable graph, the subgraph induced by the union of any two color classes is connected.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句