你还可以寻找一些其他有着较高壁垒的细分，不可能迅速增加产能——现在想到北美横贯铁路，我估计短期没人能再弄一条出来。

You can also look for smaller niches where it's just about impossible to build new capacity -- North American transcontinental railroads come to mind. I doubt that anyone will ever build another.

youdao

经过数十年的争论，终于达成协议，建设一条连接东西郊的快速地铁（伦敦横贯铁路，Crossrail），但是项目动工时间不会早于2017年，而且工程成本也在不断增加。

After decades of wrangling, there is agreement at last on a fast underground Crossrail linking suburbs west and east, but this will not be open until 2017 at the earliest and the cost has spiralled.

youdao

经过数十年的争论，终于达成协议，建设一条连接东西郊的快速地铁（伦敦横贯铁路，Crossrail），但是项目动工时间不会早于2017年，而且工程成本也在不断增加。

After decades of wrangling, there is agreement at last on a fast underground Crossrail linking suburbs west and east, but this will not be open until 2017 at the earliest and the cost has spiralled.

youdao