bullboat

详细解释:n. 牛皮浅水船

详细解释：

bull.boat

n.Nautical （名词）【航海】
A shallow, saucer-shaped skin boat used especially by Plains Indians for transporting possessions and sometimes persons across rivers or streams.
牛皮舟：大草原印第安人用来运送货物有时也用来运人过河或过溪流的浅盘状的小舟