Sulphur isotopes ratios as an indicator of mammal diets and migrations

我们吃过的食物和我们储存在骨头和牙齿中的地方都有记录。这些记录被称为同位素特征。它们的存在是因为我们的骨骼和牙齿是由我们一生中所吃的食物形成的，这些食物的同位素特征已经嵌入我们的身体组织中。我们可以利用现存人类和动物的这些特征来确定他们吃的是什么食物，特别是当他们的牙齿或骨骼形成时，他们生活在哪里。

There are records of the food we have eaten and the places we have been stored in our bones and teeth. These records are called isotope signatures. They are there because our bones and teeth have been formed from the foods we have eaten over our lifetimes and the isotope signatures from those foods have been embedded in our body tissues. We can use these signatures in living humans and animals to determine what the foods they ate were, and especially where they were living when their teeth or bones were formed.