| 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 hydrogento form acids from which simple salts can be made . Halogens , in the form of gas , are used in lamps and cookers /stoves 卤素 |