1·The new route involves expanding a rail track that runs through a large swath of residential areas.
新线路需要扩建一条穿过大片居民区的轨道。
2·The error of the frame and the trail which make the crane not in parallel with the rail track is the cause of off-tracking.
在实际治理啃轨现象的工作中，一般是以提高车架和车轮的安装精度，校正和消除起重机和轨道的缺陷为主要方法。
3·All of these studies will certainly play positive and promotive roles in guiding rail track maintenance and assisting governor decision-making.
这对于下一步进行轨道养护管理辅助决策的研究必将产生积极的推动作用。