五社会地理学材料革命和全球化在历史上 ,每个社会都由三类基础设施维系 ,它们是民族间贸易和交往的枢纽和途径。首先是交通 :河流、道路、运河 ,在当代是铁路、高速公路和航空。其次是能源系统 :水力、电网、石油和天然气管线等。第三是通讯 :邮政系统 (沿交通干道而设 ) ,然 V. Social Geography Material Revolution and Globalization Historically, each society was maintained by three types of infrastructure, which are the hubs and channels for trade and contacts among nations. The first is traffic: rivers, roads, canals, in modern times are railways, highways and aviation. Followed by energy systems: water, power grids, oil and gas pipelines and more. The third is communication: the postal system (along the traffic trunk and set up), of course