单词	barium fluoride
释义	barium fluoride noun : a white, solid, crystalline compound BaF2 that is used as a material in optics (as in lenses) and as a flux (see flux entry 1 sense 6) in some enamels Barium fluoride would resist the cesium, but it was suitable only for the windows, not for the entire vacuum cell containing the cesium. Nick Taylor, Laser, 2000 Word History First Known Use 1868, in the meaning defined above
随便看	sprucy sprue spruer sprues sprug sprugs spruiked spruiker spruikers spruiking spruiks spruit sprung sprung (for) sprung (up) sprung for sprung from sprung hock sprung on sprung rhythm sprung up sprung weight sprung-rus sprunt spry

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。