whirbone

例句：

1. 1. The hunter found a whirbone in the forest.
   猎人在森林里发现了一根牛角骨。
2. 2.The old man used to make whirbones for his grandchildren.
   那位老人过去常为他的孙子孙女制作牛角骨。
3. 3.The whirbone was so sharp that it could cut through even the toughest leather.
   这根牛角骨非常锋利，甚至能切断最坚韧的皮革。