求翻译：全国八大长途交换中心之一，全国卫星通信网六大枢纽之一，华中最大光纤通信汇接中心，全国第三大卫星地球站。是什么意思？

One of eight nationwide long-distance switching center, hub of the country one of the six satellite communications network, the largest central tandem optical fiber communications center, the country's third largest satellite earth station.

The 8 largest long-distance exchange centers in the world. The national satellite communications network, 6 large hubs in the middle of China's largest optical fiber communication link, the first National Center received 3 large satellite Earth stations.

Nation one of eight big long-distance switching centers, nation satellite communications network one of six big key positions, Central China biggest optical fiber communications junction center, national third big sputnik Earth station.

One of eight long-distance national switching Center, one of the six major hub of national satellite communication network, central China's largest optical communication tandem Center, the country's third-largest satellite earth station.

Eight major long distance of the whole country exchange one of the centres, one of six major pivots of communication network of national satellite, the largest fiber optic communication of Central China gathers together and connects the centre, the third largest satellite earth station in the whole