牙膏和漱口水是氟的良好来源。

Toothpastes and mouthwashes are good sources of fluoride.

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你能做什么：喝很多的瓶装不加氟的氺

What You Can Do: Drink plenty of bottled, non-fluoridated water.

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该方法适于固态生物样品中氟的测定。

The method can determine fluorine in solid biologic samples.

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And, likewise, if we look at fluorine in its diatomic molecule, it is 160 kilojoules per mole.

一样的，如果我们观察二价的氟，它是每摩尔160焦。

麻省理工公开课 - 固态化学导论课程节选

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

- And we can think about why -- essentially we have fluorine and now we're adding another electron. So you can picture that fluorine is going to get larger in this case And that would be true for all of the negatively charged ions.

我们可以想一想这是为什么-,本质上来讲我们现在给氟原子加上了,另外一个电子,因此大家可以想象在这种情况下氟将变大,而且这对于其它负离子也是成立的。

麻省理工公开课 - 化学原理课程节选