轨道车

例句：

1. 1.The engineers are responsible for designing and maintaining the tracks of the train cars.
   工程师负责设计和维护火车的轨道。
2. 2. The train cars were packed with passengers heading to the airport.
   火车车厢挤满了前往机场的乘客。
3. 3.The new tramcar will be faster and more comfortable than its predecessors.
   新的有轨电车将比其前身更快、更舒适。