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

牙齿氟斑病主要是无害的牙齿染色，最早在自然高氟化物地区被观察。

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

书中也没有对饮水加氟法进行阐述，在营养学方面也较少被提及。

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有明显且重要的效果。

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了像这样的研究，该研究观察了加拿大卡尔加里在 2011 年停止在水中添加氟化物后的。

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。

There have been scientists who have opposed fluoridation from the start in 1945, when it was first put into water intentionally.

自1945年氟化物首次被有意加入水中以来，一直有科学家从一开始就反对氟化。

In about 1950, the American Dental Association made its first statement supporting fluoridation.

大约在1950年，美国牙科协会首次发表声明支持氟化。

The CDC said that water fluoridation is one of the greatest, most significant public health achievements of the 20th century.

美国疾病控制与预中心称，水氟化处理是20世纪最伟大、最具意义的公共卫生成就之一。

He often wears a t-shirt that says, fluoridation?

他常穿一件T恤，上面写着：“加氟？”