但是随着铁路运营里程的增加，铁路基础设施受自然灾害的风险也在提高。
But with the increase of the railway running mileage, the risk of its infrastructure's being affected by natural disaster becomes higher.
世界上一次性建设里程最长、运营速度最快的铁路——武广高铁客运新干线正式开通运营。
Wuhan-Guangzhou high-speed railway, which has the world's longest mileage of one-time construction and the highest speed of railway operation, has officially opened.
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