jiàn / shè / zhè / tiáo / tiě / lù / de / gōng / rén / men / yī / lù / pī / jīng / zhǎn / jí / zhōng / yú / wán / chéng / le / rèn / wu

建设这条铁路的工人们一路披荆斩棘，终于完成了任务。

The workers building this railway overcame every obstacle and finally completed the task.