The address is u-s-a-l-e-a-r-n-s dot o-r-g.

VOA: special.2009.01.15

It turns out there's a new function strlen S-T-R-L-E-N that you probably have not used yet called strlen, S-T-R-L-E-N, programmers early on and still like to be succinct but communicates sufficiently what they mean.

结果这里有个新的函数,你可能没有使用过，叫做，早期的和现在的程序员喜欢简洁地,但是能充分的传达他们的意思。

哈佛公开课 - 计算机科学课程节选

So, it would be a good question to ask n why are we limited clearly there's this relationship between l and n, and we can't get any higher than n equals one.

那我们要问了,为什么我们被限制了，很明显，l和,有关系，为什么不能取到，n-1更大的值。

麻省理工公开课 - 化学原理课程节选

So finally, if we talk about our last example of when n is going to be equal 2, l -1 and then minus 1 for m.

最后我们要讲的,这个例子，是n等于2时，等于1，we，can，have，2，，1，for，l,而m等于。

麻省理工公开课 - 化学原理课程节选

ml=-2 So let's say we have n equals 4, and n sub l equalling negative 2.

这里n等于。

麻省理工公开课 - 化学原理课程节选

We know that the orbitals for multi-electron atoms depend both on n and on l.

我们知道对于多电子原子轨道,是依赖于n和l的。

麻省理工公开课 - 化学原理课程节选

l So, if we're talking about a 4 p orbital, and our equation is n minus 1 minus l, the principle quantum number is 1 4, 1 is 1 -- what is l for a p orbital?

我们方程是n减去1减去，主量子数是，4，1是1，--p轨道的l是多少？,学生：

麻省理工公开课 - 化学原理课程节选

The other main difference that we're really going to get to today is that in multi-electron atoms, orbital energies depend not just on the shell, which is what we saw before, not just on the value of n, but also on the angular momentum quantum l number. So they also depend on the sub-shell or l.

我们今天要讨论的,另一个很重要的区别就是,在多电子原子中，轨道能力不仅仅依赖于，我们以前看到的外层，不仅仅依赖于n的值，而是与角动量量子数也有关系,所以它们也依赖于亚外层或者。

麻省理工公开课 - 化学原理课程节选