求翻译：我国在城市交通规划及城市轨道交通规划研究中已经积累了丰富的理论与方法,但是对于都市圈交通规划研究则刚刚起步,虽然我国也进行了长江三角洲地区轨道交通规划,珠江三角洲轨道交通规划,也取得了不少成果,但仍然没有形成系统的理论与方法。因此,本��是什么意思？

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Our country already accumulated the rich theory and the method in the municipal transportation plan and in the city track transportation plan research, but regarding metropolis circle transportation plan research then just started, although our country has also carried on the Yangtze River delta are

In urban transport planning and planning of urban rail transit in China has accumulated a wealth of theory and methods in the study, but for metropolitan transportation planning study is just getting started, although our country has also carried rail traffic planning in Yangtze River Delta, Pearl R

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