But another thing that's cool about it is that, most strontium doesn't start out as strontium.

但另一件很酷的事情是，大多数锶刚开始并不是这种元素。

For one thing, there's more than one isotope — or form — of strontium.

一方面，锶的同位素或形式不止一种。

But it left behind a slurry of other elements, including types of radioactive strontium, caesium, and technetium.

但它留下了其他元素，包括放射性锶、铯和锝。

And then, the strontium you eat and drink gets incorporated into your teeth!

然后，你吃的和喝的锶会进入你的牙齿！

But another thing that’s cool about it is that, most strontium doesn’t start out as strontium.

但另一件很酷的事情是，大多数锶并不是以锶开始的。

Strontium, man: It knows where you've been.

锶，伙计：它可知道你去过哪里哦。

It's not getting any more new calcium, so the strontium ratio is set forever.

它不再获得新的钙，因此锶的比例永远固定了。

The enamel coating your teeth contains lots of calcium, and strontium is like calcium in a lot of ways.

牙齿上的牙釉质含有大量钙，锶在很多方面都和钙非常类似。

It’s not getting any more new calcium, so the strontium ratio is set forever.

它不再获得任何新的钙，所以锶的比例永远不变。

Strontium, man: It knows where you’ve been.

锶，伙计：它知道你去过哪里。