求翻译 中国高速铁路网由中国铁路公司运营。该铁路网包括所有商业高速列车运行服务，这些列车的平均时

China's high-speed rail network by China railway company operation. The network covers all commercial high-speed train service, the train's average speed of 200 kilometers or more. At present China has the world's longest high-speed network, operating in the line of about 9300 kilometers. On December 25, 2012, China started the longest line in the world, the route from Beijing to guangzhou, 2998 km. High-speed rail service introduced into China in 2007. Under the government's strong support, high-speed network is rapidly expanding.

这是哪套题啊？