Tanzania 's two main railways are rickety .

坦桑尼亚的两大主要铁路已处于风雨飘摇中。

The railways ministry 's debts have ballooned in recent years .

铁道部的债务在近几年迅速膨胀。

Or take speed . In the 19th century horses and sailboats were replaced by railways and steamships .

再拿交通速度来说，19世纪时的马和帆船被火车和轮船取代。

That is paying for new roads , faster railways and lavish training programmes .

这将用于新道路、高铁及大型运输项目的建设。

There is also the question of whether lithium-ion batteries are tough enough for the world of railways .

另外，锂电池足够坚固耐用以适应世界各地的列车也是一个问题。