subterranean railway

• 地下铁路

subterranean railway的用法和样例：

例句

1. There is a big underground railway system in London.
   伦敦有庞大的地下铁路网。
2. The new underground railway will facilitate the journey to all parts of the city.
   新的地下铁路将为去城市各处提供方便。