casting scull

例句：

1. 1. The ship's casting scull is a marvel of engineering.
   这艘船的铸造船首是工程学的奇迹。
2. 2.The cast iron scull has been preserved for centuries.
   这个铸铁船首已经保存了几个世纪了。
3. 3. The scull was designed to improve the stability of the boat.
   这个船首的设计是为了提高船的稳定性。