aitch bone

例句：

1. 1. The dog was so strong that it could easily break the aitch bone of an adult.
   这只狗非常强壮，可以轻松地咬断成年动物的硬骨头。
2. 2. The old man had a hard bone in his back and couldn't bend over easily.
   这位老人背部有一块硬骨头，很难弯腰。
3. 3. The farmer had to dig up the aitch bones of the cattle to make hay.
   为了制作干草，农民不得不挖出牛的硬骨头。