A digraph D is unilateral.有向图D是单连的.We shall abbreviate'directed graph'to digraph.我们将把“有方向的图”简称为方向图.There fore we study the kings of locally semicomplete digraph by its characterization.文章通过研究局部半完全有向图的结构定理,分类讨论了...
Across the busy plaza, vendors sell hot dogs and croissant sandwiches.在热闹广场的另一边，摊贩叫卖着热狗和羊角三明治。Vendors displayed their wares in baskets or on the ground.小贩们把他们的商品摆放在篮子里或地上。Vendors were doing a brisk trade in souvenirs.商贩们...