第三部分：我国民航机场业概述。
Part III: Outline of China's civil aviation airport industry.
高速公路，道路桥梁，民航机场，港口码头。
Expressway, road and Bridges, civil airfield, harbors, wharfs.
旅客对航班延误时民航机场所提供的服务总体感觉不满意。
The passengers who experience flights delay were dissatisfied with the general service of the airport.
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