And when we talk about size, I'm again just going to say the stipulation we're not talking about an absolute classical concept here, but in general we're going to picture it being much further away from the nucleus as we move up in terms of n.

当我们说到尺寸时，我们只是说――,经典的绝对的概念，而是它大约,离原子核有多远。

麻省理工公开课 - 化学原理课程节选

That's something that will come up in the lecture tomorrow, so remember that concept and that revision of this sort of classical picture.

这也是我们明天的课堂内容,所以你们脑海中得有这个概念,包括这个经典的细胞流程的修订版

耶鲁公开课 - 生物医学工程探索课程节选