if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.

如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。

麻省理工公开课 - 化学原理课程节选

It might not have any electrons in it, but it still exists, so you need to draw these into your molecular orbital diagram.

也许它里面没有电子，但它是存在的，所以你需要在分子轨道图里画出来。

麻省理工公开课 - 化学原理课程节选

You've got moderate socialists, you've got this whole kind of different people, and they're meeting around tables, and talking, and arguing, and debating, and yelling, and hugging, long into the night, as the guns draw nearer.

还有温和派的社会主义者,各类立场迥异的人,围坐在桌前,交谈,争执,辩论,吼叫,当然也拥抱,就这样直到夜幕降临,枪声渐近

耶鲁公开课 - 1871年后的法国课程节选

So you can draw that into your notes.

你可以把这张图画在你们的笔记上。

麻省理工公开课 - 化学原理课程节选