负密度差顶替时掺混量比正密度差顶替小。

The blending volume of negative density difference displacement is much less than that of the positive density difference displacement.

youdao

比如，可能它的形式电荷为负一，因为在一定程度上它得到了这么多的共用电子密度，那么它现在就有了负的形式电荷。

So for example, that might have a formal charge of negative 1, because to some extent it has gained that much electron density that it now has a formal charge that's negative.

youdao

实验和理论显示，对于局域共振声学材料而言，动态质量密度甚至还会变成是负的。

The dynamic mass density can even be negative for the locally resonant sonic materials, as demonstrated both experimentally and theoretically.

youdao

Sometimes we have a very electronegative atom that's going to take more of its equal share of electron density.

有时候我们会有一个电负性很高的原子,它将会获取更多的共用电子密度。

麻省理工公开课 - 化学原理课程节选

So for example, that might have a formal charge of negative 1, because to some extent it has gained that much electron density that it now has a formal charge that's negative.

比如，可能它的形式电荷为负一，因为在一定程度上它得到了这么多的共用电子密度,那么它现在就有了负的形式电荷。

麻省理工公开课 - 化学原理课程节选

So we can think of a third case where we have the 3 s orbital, and in the 3 s orbital 0 we see something similar, we start high, we go through zero, where there will now be zero probability density, as we can see in the density plot graph.

第三个例子那就是,3s轨道,在3s轨道里，我们看到类似的现象,开始非常高，然后穿过，这里，概率密度是0，就像你们在概率密度图里看到一样，然后我们到负的。

麻省理工公开课 - 化学原理课程节选