He was the engineer of a railroad in the mountains with many Bridges and tunnels.

他是一条铁路的工程师，该铁路筑于山里，有许多桥梁和隧道。

youdao

It has cost a lot of money to build all these Bridges and tunnels, and it took years to complete them. Many lives were lost during the building.

建造这些桥梁和隧道花费了大量的金钱和数年时间。很多人在建筑的过程中失去了生命。

youdao

Many large scale projects such as tunnels, viaducts, river bridges, riverbanks and irrigation works hinge et al. , there use time are as long as several decades or even centuries.

大型基础工程如地下隧道、高架桥、跨江桥、江河堤和水利枢纽等构筑物，它们的使用期长达几十年甚至上百年，对它们进行健康监测的概念很早就提出了。

youdao

Authorities warned many roads, bridges and tunnels would remain closed for an extended time, creating trouble not only for commuters but also companies.

WSJ: Travelers Face a Nightmare