Stable isotopes in bone collagen and tooth enamel varies among mammals dependent on where they lived and what they ate.

稳定的同位素在骨骼的胶原蛋白或 牙釉质中因不同的哺乳动物而异这取决于它们住的地方和吃的东西。

Within the bone, collagen forms of matrix, and along with calcium, it makes our bones extremely sturdy and resistant to decay.

在骨骼中，胶原蛋白是基质的一种，它和钙一起，使我们的骨骼非常坚固，能抵抗骨骼中的腐烂。

" In the study, we analyzed the bone collagen of the foxes and saw that there are indeed these different strategies of feeding."

“在研究中，我们分析了狐狸的骨胶原，发现确实存在这些不同的进食策略。”