track fastened directly to steel girders

例句：

1. 1. The train tracks are visible from the station.
   从车站可以看到火车轨道。
2. 2. He followed the trail of footprints to find his lost dog.
   他沿着足迹找到了他的丢失的狗。
3. 3. The path is narrow and winding through the forest.
   这条小径狭窄曲折地穿过森林。