快速线 meaning in Chinese

express order wire

Based on an introduction of regional rapid rail transit in shanghai guangzhou , and tianjin , the features and effects of rapid rail transit on urban development are presented , and it is concluded that the construction of regional rapid rail transit will optimize and adjust urban layout relieve urban pressure and improve urban living standards
摘要通过介绍上海、广州、天津等城市的市域性轨道交通快速线，阐述了轨道交通快速线的特点及其对城市发展的重要作用；说明通过修建市域性轨道交通快速线，可以达到优化调整城市布局、缓解城市压力、改善城市生活质量的目的。