1. The government is investing heavily to modernize the national railway system.
政府正投入巨资以实现国家铁路系统的现代化。

2. The railway system plays a vital role in transporting goods across the country.
铁路系统在跨国货物运输中发挥着至关重要的作用。

3. Due to the heavy snow, the entire railway system was temporarily suspended.
由于大雪，整个铁路系统暂时停止运行。

A: How can we reduce carbon emissions in the transport sector?
A：我们如何才能减少交通领域的碳排放？

B: Expanding the railway system could be a highly effective solution.
B：扩大铁路系统可能是一个非常有效的解决方案。

1) 铁路运输网络

2) 铁路设施体系

3) 铁路运营系统

1. 铁路系统

e.g. The expansion of the railway system has boosted local trade.
铁路系统的扩张促进了当地的贸易发展。

noun phrase

1. A network of tracks, trains, and related infrastructure used for transporting passengers and goods by rail.