The infinite distances of space are too great for the human mind to comprehend.太空的无垠距离遥远得让人类的大脑无法理解。The bat judges distances by a kind of echo - location.蝙蝠用一种回声测定法来判断距离.The eye can accommodate itself to seeing objects a...
We shall consider partitions of the edges of graphs and hypergraphs.我们将考虑图和超图的边的划分.This paper discusses the upper chromatic number of the Cartesian product of co - hypergraphs.讨论反超图的笛卡儿积的着色理论,求出了满足一定条件的反超图的笛卡儿积的上色数....