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Some new airports, ports and roads are being built, and the "Golden Quadrilateral" highway, linking India's four biggest cities, is being expanded to six lanes. 正在建設一些新機場、港口和公路，連接印度四座最大城市的“黃金四邊形”高速公路網將拓寬爲六條車道。 210.32.205.64