So what is actually going to matter is how closely that electron can penetrate to the nucleus, and what I mean by penetrate to the nucleus is is there probability density a decent amount that's very close to the nucleus.

所以实际上有关系的是,电子可以穿越至原子核有多近,我所指的穿越至原子核是,这里有一定数量的概率密度,可以距离原子核非常近。

麻省理工公开课 - 化学原理课程节选

That's practically all I ate all the way across the country.

在我们穿越全国的旅程中我几乎只吃这个。

耶鲁公开课 - 1945年后的美国小说课程节选