continuous rail joins

例句：

1. 1. The railway line runs through the city, connecting several important cities.
   这条铁路线穿过城市，连接了几个重要的城市。
2. 2. The continuous rail system is essential for transportation in this region.
   连续的铁路系统对于这个地区的交通至关重要。
3. 3. The engineers were tasked with designing a new continuous rail system to improve efficiency.
   工程师们被委托设计一个新的连续铁路系统来提高效率。