de scribes
造句带翻译释义:1.Graph symmetry theory de-scribes the equivalence relationship on topological structure between graph objects (vertices and edges).图对称理论刻画了网络中的对象（顶点和边）之间在拓扑结构上的等价关系。
2.The first chapter de-scribes the apppcation and academic background of graphene nano-devices.第一章主要介绍石墨纳米电子器件的学术与应用背景。