我正在这样做，因为就像氯化钠那样一正一负。

I am doing this for plus one minus one like sodium chloride.

youdao

,最大值，为正一,最小值，为负一，因此振幅显示这是。

the highest value is plus one and the lowest value is minus one, so the amplitude indicates that is...

youdao

其中有一个非常重要的地方需要注意，不是硼，而是正一价硼离子，因为我们已经拿走了一个电子了。

so it's important to note that it's not in b, now we're talking about b plus, because we've already taken an electron out here.

youdao

So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.

我们可以想象比较一下钾离子,与钠离子，它们都同样带有正一价的电荷。

麻省理工公开课 - 化学原理课程节选

So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

我们现在研究的是,一正一负俩个带电粒子之间的,作用力-在这里。

麻省理工公开课 - 化学原理课程节选

B=0 There's going to be some temperature where B is equal to zero. In that case, your gas is going to look awfully like an ideal gas.

在某个温度,这时，实际气体的表现，十分接近理想气体,高于这一温度它是正的。

麻省理工公开课 - 热力学与动力学课程节选