Their expertise is increasingly in demand as urban expansion pushes the limits of our transportation, utility, and communications systems.

随着城市的扩张，交通系统、基础设施和交流系统也拓展了范围，这使得工作对毕业生的技能水平的要求越来越高。

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As a guide element of urban expansion and the urban structure framework, road traffic has a complicated relation with spatial form evolution of old cities.

作为城市拓展导向要素以及城市结构骨架的道路交通，与旧城空间形态演变之间存在复杂的关系。

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Population expansion in modern cities caused the problem as the house crowding, the traffic jam, and urban environment worsening and so on.

现代城市由于人口过度膨胀而导致的住房拥挤、交通堵塞、城市环境恶化等现象使城市人们向往更富自然、生态气息的绿色空间。

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The summit was originally conceived as a forum to discuss ways of managing the urban expansion in a way that is environmentally friendly and economically viable.

BBC: Safety focus at skyscraper summit

Just as important is a willingness to limit or relocate urban and industrial expansion.

ECONOMIST: The threat grows from rising water and sinking buildings