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fluoridation

noun
/ˌflɔːrɪˈdeɪʃn/, /ˌflʊərɪˈdeɪʃn/
/ˌflɔːrɪˈdeɪʃn/, /ˌflʊrɪˈdeɪʃn/
[uncountable]
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  1. the practice of adding fluoride to drinking water to prevent tooth decay (= damage from natural causes or lack of care)饮用水氟化(以防止牙齿蛀蚀)

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