Fourth, there's generally some arrangement, either for the publication of the treaty, or its deposition, its safe-keeping in some sort of shrine.
第四是一些笼统的安排,对条约的公布,或者废除,然后放在圣坛里,安全保管。
what three quantum numbers tell us, versus what the fourth quantum number can fill in for us in terms of information.
三个量子数和,四个量子数告诉我们的信息。
You hadn't had,yet,the creeds that would try to settle these things for good, like you did in the third and fourth century--the fourth century.
你没有固定的判断标准,可以永远解决这些事情,它不像主后第四世纪。
How many of you have seen the Taco Bell series of advertisements for the fourth meal?
你们多少人看过塔可钟,宣传第四餐的那个系列的广告
If you talk about going in for surgery, t have the exact figure in front of me, but something like a fourth of the people in Canada wait six month or more for surgery.
谈到手术,呃,我这里没有确切数据,ehm,,I,don’,但大约,四分之一的加拿大人,要等六个多月之久,才能手术。
But at the time, they didn't have a well-formed name for it, they were just saying OK, there's this fourth quantum number, there's this intrinsic property in the electron.
但在那时,人们没有给它取名,他们只是说ok,这是第四个量子数,这是电子的本征性质,
So we can completely describe an orbital with just using three quantum numbers, but we have this fourth quantum number that describes something about the electron that's required for now a complete description of the electron, and that's the idea of spin.
所以我们可以用3个,量子数完全刻画轨道,但我们有这第四个量子数,来完整的,描述电子,这就是自旋的概念。
s1 So for the fourth period, now we're into the 4 s 1 3d for potassium here. And what we notice when we get to the third element in 4s2 and the fourth period is 3d that we go 4 s 2 and then we're back to the 3 d's.
对于第四周期到现在我们来到钾的1,然后我们返回到,我们注意到当我们看到第三个元素,第四周期我们来到,然后我们返回到。
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