hopper car

例句：

1. 1. The hopper carwas used to transport heavy goods.
   运货卡车被用来运输重货物。
2. 2. The hopper car was loaded with supplies for theconstruction site.
   运货卡车装载了为建筑工地准备的物资。
3. 3. Thehopper car was acrucial part of the delivery process.
   运货卡车是配送过程的关键部分。