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For example, if a graph has exactly one cycle, then all graphs in its isomorphism class also have exactly one cycle.

"这一概念图同构"使我们能够区分图形性能固有的结构图自己从性能与图申述：图图，数据结构的图形，图表标号等例如，如果一个图，正是一个周期，然后在其所有图形类也有同构的一个周期。

Graph isomorphism problem is one of the problems that have not been classified as NP complete, or within P.

根据图同构国内外目前的研究进展，图同构既未被归入P问题，也未被归入NPC问题，是一个尚未解决的问题，有待进一步研究。

A novel method,the circuit simulation algorithm,is proposed here,whichtransfers the graph isomorphism problem into the identical circuits problem.

提出了一种新的同构判定算法：电路模拟法，即将图的同构问题转化为电路的相同问题。

Graph isomorphism ; NP problem ; P problem ; NPC problem ; Graph isomorphism complete

图同构； NP问题； P问题； NPC问题；图同构完备

Since the graph isomorphism problem is neither known to be NP-complete nor to be tractable, researchers have sought to gain insight into the problem by defining a new class GI, the set of problems with a polynomial-time Turing reduction to the graph isomorphism problem.

由于图同构的问题既不是已知的NP完全问题，也不是听话的，研究人员设法深入了解这个问题，确定了一类新基的一系列问题，多项式时间图灵减少的图同构问题。

Correspondingly, the concept of fuzzy regular semiideal is introduced and the correspondence theorems of fuzzy regular semiideals and the isomorphism theorems of fuzzy regular quasi-quotient rings are established under ring homomorphism.

相应地，我们引入了模糊正则半理想概念，建立了环同态下模糊正则半理想的对应定理以及模糊正则拟商环的同构定理。

The concept is simple but it's not so easy to determine whether two graphs are isomorphism or not.

同构的概念看似简单，但是，判定两个图同构却不是一件简单的事情。

At the same time, isomorphism for many special classes of graphs can be solved in polynomial time, and in practice graph isomorphism can often be solved efficiently.

与此同时，同构为许多特殊类别的图形就可以解决在多项式时间内，并在实践中图同构，往往可以有效地解决。

The road of the French army from Vienna to Znaim was shorter and better than the Russians' road from Krems to Znaim.

若是库图佐夫下定决心沿途退却，从克雷姆斯撤退到奥尔米茨，同俄国军队汇合，那末在这条路上，那些越过维也纳大桥的法国人就要抢先一步，使库图佐夫遭受危险，这样一来，他就要被迫携带各种重型装备和辎重在行军中作战，同兵力优越二倍、从两面向他夹攻的敌人作战。

Ai was raised in a labour camp in China's remote northwestern region of Xinjiang, after his father, Ai Qing -- himself regarded as one of China's finest modern poets -- was purged in the 1950s after being denounced as "an enemy of the state and a rightist".

奥运会在中国掀起了民族自豪感的高潮，这同艾未未所做的批评形成了鲜明的对比。尽管他的言论同国外主要民权组织专门选择在这一时刻发出的批评声音达成了统一。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。