adj.(云)脊状的,脊状云
Now we need a vertex buffer.
现在我们需要一个顶点缓冲.
A graph is regular if every vertex has the same degree.
如果一个图的每个顶点都具有相同的度数,则称它是正则图.
A vertex with zero outdegree is called a sink.
出度为零的顶点称作收点.