學個詞 Learn A Word:2280_fluoride

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　　今天我們要學的詞是 fluoride. Fluoride 氟化物。The U.S. government is lowering the recommended amount of fluoride added to drinking water for the first time in more than 50 years. 美國政府50多年來首次降低飲用水建議添加的氟化物的含量。有關(guān)官員解釋說，People may get too much fluoride these days because it is also added to toothpaste, mouthwash and other products. 現(xiàn)在牙膏，漱口液等產(chǎn)品內(nèi)也添加了氟化物，這種情況可能會使人們攝取過多的氟化物。好的，今天我們學習的詞是 fluoride, fluoride, fluoride...