Tooth mousse, it's meant to protect the enamel on your teenth.

护牙素，用保护牙的。

We lose the enamel of teeth.

我们失去牙。

Enamel is the hard mineralized outer layer of the tooth.

牙是牙齿坚硬的矿化外层。

The tooth has an enamel covering so it's relatively shiny.

牙齿表层有牙 所以稍微亮些。

If you said enamel, flash a big old smile.

如果你选择牙，那就答对了。

And your teeth aren't hard enamel all the way through.

并且牙齿并不是全都是牙。

If you zoom way in, tooth enamel looks almost like the weave of a basket.

如果放大牙，它与篮子的纹理非常相近。

Tooth enamel is the hardest substance in your body, did you know?

你知道吗，牙是人体内最坚硬的物?

Fluoride protects us from cavities by remineralizing enamel on our teeth.

氟化物通过再矿化牙保护我们免受蛀牙的侵害。

The organoids happily churned out the chemical components of enamel.

类器官愉快地分泌出了牙的化学成分。

Enamel is the strongest stuff in your whole body -- even stronger than bone!

牙是全身最坚硬的东西，甚至比骨头还硬。

So building enamel is like making rocks in your mouth.

所以生产牙就像在你嘴里生产岩石。

Even with protective enamel ridges, these teeth would gradually have worn down.

即使是有保护的脊，这些牙齿也会逐渐被磨损。

Many foods weaken our enamel and brushing right after can actually damage your teeth.

许多食物损伤牙，吃完饭后就刷牙，实际上也损伤牙齿。

Millions of these rods packed together make up the enamel layer of your teeth.

这些成千上万的结晶物排列堆积，形成了你的牙。

The first step was to work out exactly how enamel is produced.

第一步是弄清楚牙如何产生。

Frequent use of fluoride-containing mouthwashes, gels, toothpaste, and tablets will also fortify the enamel.

经常使用含氟的漱口水、凝胶、牙膏和药片也可以强化牙。

Dentin is pretty hard, but unlike enamel, it's porous.

牙本非常硬，但与牙不同，它是多孔的。

For enamel, this process produces long, thin strands, each about 60 nanometers in diameter.

在生成牙的过程中会产生细长的纤维状物，每条纤维的直径宽约60纳米。

This acid can cause holes, called cavities, to form in the enamel of your teeth.

这些酸会造成蛀牙洞，形成在牙表面。