Fluorin can avoid brown striation and whiten skins.氟:能消除褐色斑,使皮肤变白.The free fluorin content in liquid multi - vitamin was quantitatively analyzed by using a simple potentiometric titration.使用简单的电位滴定法定量分析维生素中游离氟的含量.It is c...

n.氟...

fluorin的音标：fluorin的英式发音音标为：['flʊ(:)ərɪn]fluorin的美式发音音标为：['flʊ()ərɪn]...