flat-car

例句：

1. 1. The flat-car was used to transport goods over long distances.
   平板车被用来运输货物跨越长距离。
2. 2.The flat-car was loaded with boxes of books for the trip.
   平板车上装载着用于旅行的箱子。
3. 3. The flat-car was a popular mode of transportation in the old days.
   平板车是旧时代一种流行的交通工具。