前言： 随着“西气”进沪，上海形成了“东、西”双气源供气的格局。
The entrance of West gas into Shanghai has made it a double-gas supplied city.
按照上海世博会组委会的规定和要求，世博会期间，外地所有进沪车辆需申领办理《通行证》。
According to regulations of Shanghai World Expo Organizing Committee, vehicles from other places should apply permissions when they intend to enter Shanghai City.
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