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。
L.A.'s not as exciting as New York, I guess. It's more suburban and residential than New York.
我认为洛杉矶没有纽约精彩,她更属于郊区,更适宜居住。
We didn't just need that n, not just the principle quantum number that we needed to discuss the energy, but we also need to talk about l and m, as we did in our clicker question up here.
我们不仅需要n,不仅要这个可以,决定能量的主量子数,还需要m和l,就像我们做这道题这样。
Some languages like English has a-- have a distinction between 'l' and 'r.' Other languages do not.
某些语言,如英语,在"l"和"r"之间是有差别的,其他语言则没有
Whereas the list assignment you see here did not rebind the object l 1, it changed this. OK?
并没有对包含1的对象做重新绑定,所以这有所改变,对不对?
New York is different. It's still diverse but not as diverse as L.A., I feel like.
纽约就不同了。纽约也很多元化,但和洛杉矶相比还差一些。
When I was working in a place called Tulle, which is down here--t-u-l-l-e, not Tours, but Tulle-- I knew vaguely that there had been a massacre there in June sixth, 1944, and a lot of people had been hung.
我在一个叫蒂勒的地方工作的时候,在这里t-u-l-l-e,不是图尔是蒂勒,我大概记得,在1944年六月六号那里有个大屠杀,很多人被吊死了
Angular nodes, we're not going to have any of those, we'll have zero, l equals 0, so we have zero angular nodes.
角向节点,当然,是没有的,0个,l等于0,所以是0个角向节点。
So I'm not even willing to use the L words in describing what it is we have." Right?
甚至不愿意,用爱来表达我们之间的关系?
That's really it. Not much to do in L.A..
就是这样,在洛杉矶能做的事也就是这些。
So that means it's not possible, if we've made these stipulations in the first place, to have a case where l equals 1.
这说明我们之前的假设,l等于1不可能的。
No, we can't. Because if l equals 1, we can not have m sub l equal negative 2, right, because the magnetic quantum number only goes from negative l to positive l here.
不行,因为如果l等于1,ml的值不可能等于-2,对吧,因为磁量子数的值,这时只能从-1到1
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。
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