metropolitan areas of china meaning in English

中国城市群

Since it is very urgent to a develop rapid rail transit system in the economic zones of the pearl river delta , the author makes a study of the correlative planning of transit lines , and holds that rapid rail transit system shall be mainly built in the agglomerations and some metropolitan areas of china
摘要论述了建设珠江三角洲经济区城际快速轨道交通系统的必要性，并研究了相应的线网规划方案；在我国大都市圈、城市群中，应及早进行城际快速轨道交通系统规划的研究。