北京机场 » Beijing airport 这是两棵树 » This is two trees 现在国内手机安全软件大都由其电脑演变而来，您认为是否应该出现个真正的专属手机的安全软件 » Now most of the domestic mobile...
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This is the two trees 这是两棵树
This is like saying trees don't matter, only forests do. But you can't save a forest unless you start by saving a tree or two.
这就好比说树无关紧要只有森林重要，但是你救不了森林除非你先拯救一两棵树。
Two thirds of this area is covered by trees.
这个地区三分之二的地方被树木所覆盖。
In this note, no using the contraction method, we prove that if a graph G is one edge short of having two edge-disjoint spanning trees, then G has a cut edge or G is supereulerian.
本文不利用收缩方法，直接证明了：当图G至多差一边有两棵边不相交的生成树时，G是超欧拉图或者G有割边。
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