high and low railway drawbridge

例句：

1. 1.The high and low railway bridge is a crucial part of the transportation network.
   高低铁路桥是交通网络中至关重要的一部分。
2. 2.The construction of this high and low railway bridge has been underway for several years.
   这座高低铁路桥的建设已经进行了好几年了。
3. 3.Due to its unique design, the high and low railway bridge has become a popular tourist attraction.
   由于其独特的设计，这座高低铁路桥已成为一个受欢迎的旅游景点。