1.The mostly harmless teeth staining was first observed in communities with high natural fluoridation.

牙齿氟斑病主要的牙齿染色，最早在自然高氟化物地区被观察到。

2.There is nothing on the fluoridation of water, and too little on nutrition.

书中也没有对饮水氟法进行阐述，在营养学方面也较少被提及。

3.The study authors found that prior to 1975, there was a clear and important effect on prevention of tooth decay in children due to water fluoridation.

研究作者发现，在 1975 年之前，水氟化物对儿童蛀牙的预防有明显且重要的效果。

4.Supporters of water fluoridation point to studies like this one that looked at what happened in Calgary, Canada, after they stopped fluoride in their water in 2011.

水氟化物支持者指出像这样的研究，该研究观察大卡尔里在 2011 年停止在水中添氟化物后的情况。

5.Even though no conclusive causal link has been found, a growing number of cities are planning to end fluoridation, and specialised water filters, which remove any fluoride present, are flying off the shelves.

尽管尚未发现确凿的因果关系，越来越多的城市正计划停止氟化处理，而那些能够去除水中氟化物的专业滤水器也变得供不应求。机翻