And so it has what? In contrast to the sigma, it has a nodal plane containing both nuclei.

这是什么，和sigma相反，它是包覆在核上的平面电子云，有一个界面。

麻省理工公开课 - 固态化学导论课程节选

I played around a lot with Photoshop and took some classes doing that and I had a...

我经常玩Photoshop（图像处理、平面设计），还上了些这方面的课，我就有……

迷上网页设计 - SpeakingMax英语口语达人

So, the wave function at all of these points in this plane is equal to zero, so therefore, also the wave function squared is going to be equal to zero.

因此这里的,波函数平方也等于零，如果我们说在这整个平面上,任何地方找到一个ｐ电子的概率都是零。

麻省理工公开课 - 化学原理课程节选

Here, we are not talking about a single number, but a displacement in the plane.

我们现在不是在讨论数字,而是平面上的位移

耶鲁公开课 - 基础物理课程节选

So here's the example I'm going to start with.

做二维几何的程序,关于平面上的点。

麻省理工公开课 - 计算机科学及编程导论课程节选

And when we look at this, it's actually split by what's called a nodal plane, which is pointed out in light orange here on this picture, but what we just mean is that there is this whole plane that separates the two lobes where there is absolutely no electron density.

我们来看这里，实际上它被一个节面分开，在这图里用淡黄色表示，这意味着这个分开,两个叶瓣的平面上,是完全没有电子密度的。

麻省理工公开课 - 化学原理课程节选

You go back to the same x-y plane; here is some vector A.

回到刚才的 x-y 平面上,这是某个矢量 A

耶鲁公开课 - 基础物理课程节选