求翻译：公路建设方面呈以下特点: 全国有一半以上的省份高速公路里程超过1000公里。新增公路通车里程4.6万公里,总里程达到181万公里; 其中新增高速公路4600公里,高速公路通车里程近3万公里。同江至三亚、北京至珠海、连云港至霍尔果斯、上海至成都四条国道主干线基本贯通,从而实现了“五纵七横”国道主干线系统第一阶段建设目标,即“两纵两横三个重要路段”的全部贯通。是什么意思？

Road construction were the following characteristics: there are more than half of the provinces highway mileage of more than 1000 km. New highway mileage of 46,000 km, with a total mileage of 1.81 million km; which the new highway 4600 kilometers, the highway mileage of 30,000 km. Tongjiang to Sanya

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The highway construction side delivers in person following characteristic: The nation has a half above province highway course to surpass 1000 kilometers.Increases the road to be open to traffic the course 46,000 kilometers, the total course amounts to 1,810,000 kilometers; Additional highway 4600

Road construction has the following characteristics: more than half the country's provinces over 1000 km of highway mileage. Added 46,000 kilometres of highway traffic mileage, total mileage to 1.81 million km; Added 4,600 km of freeway, highway traffic mileage of nearly 30,000 km. Jiang from Johns

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