On a less positive note, the number of newly laid off Americans seeking unemployment benefits totaled 551,000 last week, up from 534,000 the previous week.

VOA: standard.2009.10.01

The other thing that we took note as is what happens as l increases, and specifically as l increases for any given the principle quantum number.

另外一个我们要注意的是,ｌ增加时如何变化，特别是对于某个给定的,主量子数ｌ变化时如何变化。

麻省理工公开课 - 化学原理课程节选

And note that as Z increases, as the proton number increases the radius decreases for a given n number.

并注意到当Z不断增加，对于一个给定的n，即当质子数增加的时候,半径的n值就减小了。

麻省理工公开课 - 固态化学导论课程节选