adj. unlabelled
导出了无向无标号超图和标号超目的计数级数，解决了无向超图的同构和计数问题。
Then the counting series are derived for undirected unlabeled and labeled hypergraphs, thus the isomorphism and counting problems of undirected hypergraphs are solved.
给定一个无向图，编写函数找出所有的最小高度树，并返回其根标号的列表。
Given such a graph, write a function to find all the MHTs and return a list of their root labels.
用于调合汽油，提高汽油辛烷值，从而生产90号、93号及高标号无铅汽油。
It is used for adjust to match the gasoline, raise the gasoline octane value, thus produce the No. 90, 93 Numbers and high mark number unleaded gasoline.
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