fluorideKK [ˋflʊˏraɪd] /ˈflʊˌɹaɪd/发音名词1氟化物、氟Most toothpaste sold here contains fluoride to prevent cavities.这里贩售的牙膏大多含氟,可以预防蛀牙。2氟化物化学Fluoride is a compound formed when fluorine bonds with another element.氟化物是氟与其他元素结合后形成的化合物。用这个字练口说→