This is especially true on Twitter, where just about everything takes on a political valence.

在推特上尤其如此，因为在推特上，几乎所有事情都带有政治意味。

It only has two dimensions: valence and arousal.

效价和觉醒。

And the valence is actually quite negative, so you must have been a big fan.

而“抗体效价”一项也呈现负值，因此你一定是他们的铁杆粉丝。

Like everything has a political valence to it.

就像一切都具有政治价值一样。

The resulting vapor was variable, so it was difficult to meansure its valence.

蒸气是反复无常的。因些很难测量它的化合价。

These are highly reactive because they have seven valence electrons.

它们具有很高的反应性，因为它们有七个价电子。

They tend to have the same number of valence electrons.

它们往往具有相同数量的价电子。

So large, that the valence electrons aren't held very strongly by the nucleus.

如此之大，以至于价电子不会被原子核牢固地保持。

The political valence of this is kind of fascinating to me–about what side you're on.

这件事的政治价值让我着迷——关于你站在哪一边。

How many Valence electrons does sodium have?

钠有多少个价电子？