Lemons are so acidic they can actually take the protective enamel off your teeth.

实际上柠檬酸到可以把你牙齿上具有保护性质的珐琅质去除掉。

Fire had polished the sparkling enamel of its inner walls, sprinkled all over with mica-rich dust.

火力把珐琅质的和发光泽为洞壁摩亮了，洞壁上满是云母石的粉屑。

They're false in that they're not made of what our teeth are made of: dentin and enamel.

“伪牙”不是由我们牙齿的材料——牙本质和珐琅质——构成的。

It's spongy and has nerve endings, soyour tooth might be sensitive to sweets or cold if the decay reaches there.

牙本质不如珐琅质坚硬，含有很多的神经末梢。因而，如果牙本质也受到了腐蚀，牙齿对甜食或是过冷的东西就会很敏感。

Dentists sometimes will fill a cavity by putting in a filling while the decay is still in the enamel.

当珐琅质遭到腐蚀时，医生有的时候会采取补牙的方式进。

First, the acid eats away the very hard outer layer of yourtooth, called the enamel. Inside the enamel is the dentin.

酸性物质会先腐蚀掉牙冠表层的珐琅质。珐琅质所包覆的便是牙本质。

If it's properly treated, the decay will stop, and the enamel will harden, although the tooth will never be perfect again.

如果得当，腐蚀将会停止，珐琅质也会重新变硬，美不足的是，牙齿不会像受腐蚀前那么完美了。

His skin was pale, too pale, and his teeth were more stains than enamel.

他的皮肤苍白得过分，而牙齿则更像污渍而非珐琅质。

While each human tooth is coated in a hardy, protective layer of enamel, it's no match for acid.

尽管每个人的牙齿都覆盖着一层坚固的保护性珐琅质，但它却无法抵御酸的侵蚀。

That strengthens teeth and encourages the growth of enamel crystals that build up a tooth's defenses against acid.

这有助于强化牙齿，并促进珐琅质晶体的生长，从而增强牙齿抵御酸性物质侵蚀的能力。

Generally, as carnivores consume protein-rich meat, certain nitrogen isotopes accumulate in their tissues— including the enamel of their teeth.

一般来说， 当食肉动物食用富含蛋白质的肉时，某些氮同位素会积聚在它们的组织——包括牙齿的珐琅质。

Researchers examined the isotope ratios in skeletons' tooth enamel, which held details of their diets, when they were young.

研究人员检测了骨骼牙齿珐琅质的同位素比例，这些数据揭示了他们幼年时期的饮食情况。

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

骨骼胶原蛋白和牙齿珐琅质的稳定同位素在不同哺乳动物间有所差异，这取决于它们生活的环境和食物来源。

Teeth, for example, tend to survive decomposition very well, since their outer enamel coating is very hard and contains very little protein, if any.

以牙齿为例，由于牙齿外层的珐琅质非常坚硬，蛋白质含量也非常低，因此牙齿易于分解。

The acid content in the Coke would destroy the enamel on your teeth and the sugar would soon lead to cavities.

可乐的酸成分会破坏牙齿上的珐琅质，而糖分会很快导致蛀牙。

All these crumbling masses were covered with an enamel polished by the action of underground fires, and they glistened under the stream of electric light from our beacon.

所有这些大堆石头分解了，受地下火的力量上面浮起一层光滑的珐琅质，一经探照灯的照射，发出辉煌的光彩。

As the drink enters your mouth, it's high acid content begins to erode the enamel on your teeth. And the microorganisms in your plaque start to feed off the sugar which can lead to cavities.

当饮料进到你嘴里，高度酸性物质开始腐蚀你牙齿的珐琅质，齿菌斑的微生物会开始以这些醣类维生，导致蛀牙。

And a routine clean and scraping the plaque off the teeth and making sure you have good mineralization of the enamel of the tooth is good, but never let them do a fluoride rinse on you.

定期清洁牙齿、刮除牙菌斑并确保牙齿珐琅质有良好的矿化是好的，但千万不要让他们给你使用氟化物漱口水。