萤石中含有卤族元素氟，是制取含氟化合物的主要原料，又由于熔点低而广泛用于炼钢、有色金属冶炼、水泥、玻璃、陶瓷。

A halogen element, f, is major raw materials deriving fluorine compound, and because of low melting point, that is widely used in steelmaking, nonferrous metal smelting, cement, glass and ceramics.

youdao

你找一下电子力最大的元素在哪，氟是活泼元素中，电子力最大的。

And you see where the most electronegative elements are, and fluorine is the most electronegative of the active elements.

youdao

氟作为动物体中一种必需的微量元素，在生产上有很重要的作用。

As a necessary element of animal, fluorine has very important function in production.

youdao

And you see where the most electronegative elements are, and fluorine is the most electronegative of the active elements.

你找一下电子力最大的元素在哪，氟是活泼元素中,电子力最大的。

麻省理工公开课 - 固态化学导论课程节选

All right. So it's 7 that are in chlorine, it's the same as fluorine or any of the others in that row or in that group rather.

好，氯有七个，跟氟或者在那一列,的其它元素一样。

麻省理工公开课 - 化学原理课程节选