These are all isoelectronic, they all have the same electron configuration. And we can also think about going back to atomic size for a second.

这些都是等电子的，它们都有相同的电子排布，而,我们还可以再回想一下原子尺寸的概念。

麻省理工公开课 - 化学原理课程节选

If you just look back when they were created it's most likely to be in the 1930s.

如果你回想起,你会发现那些衍生品,大多都是上个世纪30年代出现的。

耶鲁公开课 - 金融市场课程节选

So the translation here is that whereas last week and in Scratch, the looping structures are yellow and have kind of this brace structure to them.

同理，大家回想一下上个星期,在Scratch软件中，循环结构都用黄色标记出来了,与此类似。

哈佛公开课 - 计算机科学课程节选