Section two presents some results concerning (2K_1+K_2)-free graphs. Gyárfáshas showed that chromatic number of (2K_1+K_2)-free graphs has no linear upperbound in terms of their clique number.
在第二章中，我们给出了(2K_1+K_2)-free图的一些结果．对于(2K_1+K_2)-free图，Gyárfás已经证明了其色数不能找到一个与团数有关的线性的上界。
参考来源 - 不含某些图作为导出子图的图的色数·2,447,543篇论文数据，部分数据来源于NoteExpress
一团闪电在蒙大拿上空噼啪作响，数条闪电砸向地面。
A tangle of lightning, including multiple ground strikes, crackles in the Montana sky.
“如今依然健在的编舞家中最具创造活力、最为多才多艺之人。……世界上为数寥寥、毫无异议的伟大舞蹈团之一。”——《纽约邮报》。
"The most inventive and versatile choreographer alive today... One of the few indisputably great dance companies in the world." - New York Post.
同时还应用分形理论得出水泥絮团属于典型的分形结构，其分形维数为1.846 8。
Furthermore studied the flocculated structure with fractal theory, the result show that the flocculation are typical fractal structure and the fractal dimension is 1.846 8.
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