马车之后的额外的马加入一小组马的一匹马，帮助四轮运货马车通过深水或越过困难地形。

A horse added to a team of horses to assist a wagon through high water or over difficult terrain.

youdao

马车之后的额外的马加入一小组马的一匹马，帮助四轮运货马车通过深水或越过困难地形。

A horse added to a team of horses to assist a wagon through high water or over difficult terrain.

youdao