The change,trend and latest characteristics of Contemporary Urbanization in of US
研究了二战后美国城市化进入郊区化或逆城市化阶段，人口、工厂等从市中心迁往郊区，大都市区变得多中心且碎片化，城市体系呈聚集点状，城市化向乡村扩散渗透。
Urburnization entered the stage of suburbanization or disurbanization in America after the World War Two. The population, factories, stores and all kinds of organizations moved to go out from the city center, and settled in suburbs and towns outside the city. In the process of the change,metropolitan area constituted by urban center and suburbs has gradually become polycenteric,and even had any centers.The whole metropolis has become fragmented. At the same time,the urban system has become aggregative points. After broad metropolitan area has been divided and integrated, urburnization has been scattering and permeating through countryside.