用各种稀的无机酸来萃取阴离子.A variety of dilute mineral acids are used to extract the anions.它对氟离子的选择性比其它普通阴离子高几千倍.It'shows a thousandfold selectivity for fluoride over other common anions.通常, 钙素过量是与该元素相联系的阴离子伴随产生的.In general, e...
The floods are described as the worst in nearly fifty years.这次洪灾据说是近50年来最为严重的。He was in floods of tears on the phone.他在电话里失声痛哭。The floods are the worst in living memory.那次洪水是人们记忆中最严重的一次。...