rhinocaul

例句：

1. 1.The rhinocaul is a symbol of strength and courage.
   犀牛角是力量和勇气的象征。
2. 2. The rhinocaul was used in ancient times as a weapon.
   犀牛角在古代被用作武器。
3. 3.The rhinocaul is now protected by law to ensure its conservation.
   犀牛角现在受到法律保护，以确保其保护。