从“DOWNTOWN”到“CBD”──美国城市中心的演变

From"Downtown" to "CBD"──Evolution of American city center

美国的城市中心从19世纪末开始了它的兴起、繁荣、衰败和再复兴的历程，而“DOWNTOWN”和“CBD”这两个城市中心的名称也一直伴随着它的发展过程，这两个名称虽然可以互换，但却代表着城市中心发展的不同阶段，本文以这两个单词作为出发点来讨论美国城市中心的演化过程．

City center has gone through its process of emergence, prosperity, recession and renaissance from the end of 19 century in America, in which the two words that' downtown' and' CBD' accompanied by to typify various stsges of development of city center. Depend on these two important words, this article discusses the evolution process of American city center.