Functions of road network include traffic and transportation, inbuilt space of public facilities, urban space framework, afforesting, disaster prevention etc.
对城市道路网承载的功能从交通运输、市政公用设施的埋设空间、城市骨架、绿化、防灾等七个方面进行了总结。
To save fuel consumption, it is feasible to improve the performance of cars and to study the impact of urban road traffic conditions and facilities on the law of fuel consumption.
为节省能源，不仅要改进汽车自身的性能，而且还应研究城市道路交通条件及设施对汽车燃油消耗影响的规律。
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