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The incidence of fluorosis is correlative with the content of Fluoride, which comes from mother-rock and is related to petrogenic element in soil.

土壤F土壤元素具显著正相关，主要来自于成土母质。

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The endemic fluorosis is a kind of endemia widely distributed in Ningxia, and this is strongly related to the special natural geochemical environment of Ningxia.

要地氟病是广泛分布的一种地方病，特殊的原生地球化学环境有密切关系。

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Vox 观点

This CDC recommendation is solely based on an amount that balances the protection from tooth decay while limiting the risk of dental fluorosis.

CDC 的这一建议完全基于在预和限制齿氟斑病风险之间取得平衡的剂量。

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CNN 10 学生英语 20194月合集

But too much fluoride, especially for children who's adult teeth are still forming can lead to a problem called dental fluorosis when white patches form on teeth.

但是过多的氟化物，尤其是对于儿童来，人的齿还在形阶段，当齿上形白色斑块时，就会导致一种叫做氟斑的问题。

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