(noun.) a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite.
编辑:珀西
双语例句
Davy studied later the compounds of fluorine, and though un able to isolate the element, conjectured its likeness to chlorine. 李贝.西洋科学史.