positive supply rail

例句：

1. 1. The new railway is designed to provide a positive supply rail for the city's rapid transit system.
   这条新铁路设计用来为城市的快速交通系统提供积极的供应轨道。
2. 2. The project aims to improve the efficiency of the transportation network by adding positive supply rails.
   该项目旨在通过增加积极的供应轨道来提高交通网络的效率。
3. 3.With the construction of the new railway, the city will have a more efficient and positive supply rail system.
   随着新铁路的建设，城市将拥有一个更加高效和积极的供应轨道系统。