改革开放以来,我国已经形成了珠三角、长三角、京津冀三个较为成熟、规模较大的都市经济区。2008年,三大都市圈共实现地区生产总值113465.4亿元,约占全国GDP总量的38%;进出口总额约占全国的75%;实际利用外资占全国总量的82%。三大都市圈的区域经济发展总体水平高,在国民经济中发挥着越 Since the reform and opening up, China has formed three relatively mature and large-scale metropolitan economic zones in the Pearl River Delta, the Yangtze River Delta, and Beijing-Tianjin-Hebei Province. In 2008, the three major metropolitan areas realized a total GDP of 11,346.54 billion yuan, accounting for about 38% of the national total; the total import and export accounted for about 75% of the national total; and the actually utilized foreign investment accounted for 82% of the national total. The overall economic development in the three metropolitan areas is high, playing a more important role in the national economy