In a k-coloring of a uniquely k-colorable graph, the subgraph induced by the union of any two color classes is connected.
貌似是说,从一个取标有同颜色的节,节构成的子是连接的。是样吗?
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Coat colour, an important consideration for many owners, is easily dealt with by picking the right pattern of melanocyte cells in the skin.
许多宠物的主人都比较在意动物皮毛的颜色,打印出不同的颜色只需在皮肤中选取合适的黑色排列形式就能轻松实现。
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