Truck trailers, for example, are loaded on flatcars and transported by rail to their destination, where a tractor hitches up to the trailer and speeds the goods on to another point.

• 例如；将卡车的拖车装在平板火车上；由铁路运到目的地；然后再将拖车挂在牵引车上；迅速地把货物运到别的地点去.