And then the number of pairs at month n is the number of pairs at month n - 1 plus the number of pairs at month n - 2.

我们让第一个月的兔子数是1对,第n个月的兔子对数,是第n-1个月的兔子对数。

麻省理工公开课 - 计算机科学及编程导论课程节选

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

You count n leaves--you count the number of leaves.

你数了n片叶子...不对

耶鲁公开课 - 金融市场课程节选

So,if you take number one--but we don't have to go through them all and I assure you we won't--if you take number one, the Ain,a-i-n,it's named after a river; or if you take number two,the Aisne,a-i-s-n-e, it's named after a river; and how many hundreds of thousands of people died along there in World War One or,you take number three,the same thing,Allier.

如果你看第一个省,我向你们保证,我们不用挨个了解,看第一个省,安省,a-i-n,来自一条河的名字,或是第二个埃纳省,a-i-s-n-e,来自于一条河的名字,有成千上万的人在这里死于,第一次世界大战,第三个,阿列省

耶鲁公开课 - 1871年后的法国课程节选

Core electrons are all those electrons held in really tight with the nucleus in the inner shells, whereas the valence electrons are only those electrons that are in the outer-most shell, or at your highest value of n of the principal quantum number.

芯电子是那些,在内壳层被原子核束缚得非常紧的电子，而价电子只包括,最外层的电子，或者说主量子数，n，的值最大的那些电子。

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