我将专攻地理学.I shall confine myself to the subject of geography.森林学和地理学有关.Forestry appertains to geography.那时正是地理学真正开始发生改变、许多新观念兴起的时候。It was just when geography was really beginning to change and lots of new ideas were coming...
A complete bipartite graph is a simple bipartite graph with bipartition.完全偶图是具有二分类的简单偶图.If enough edges have been drawn to make the figure connected the graph is called bipartite.如果有足够的线使图连通,这图称为双图.This graph is NOT bipa...