track lifting and lining machine

例句：

1. 1. The train tracks are laid out in a straight line.
   火车轨道是直线铺设的。
2. 2. The car's wheels leave deep tracks on the asphalt.
   汽车轮胎在柏油路上留下了深深的痕迹。
3. 3. The scientist used a laser to track the movement of the particles.
   科学家使用激光来追踪粒子的运动。