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单词 halogen
释义 halo·genBrE /ˈhælədʒən/NAmE /ˈhælədʒən/ noun (chemistry 化学) any of a set of five chemical elements, including fluorine, chlorine and iodine, that react with hydrogen to form acids from which simple salts can be made. Halogens, in the form of gas, are used in lamps and cookers/stoves 卤素
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