And we're actually going to get a little bit deeper in our clicker questions here, since when you do your problem-set it won't be quite this straight forward that you'll be answering this kind of question, but actually you'll be thinking about how many different orbitals can have certain state functions or certain orbital names.
事实上我们要讲的,比这个问题还要深一些,因为当你们做习题集的时候,你们不会遇到这么明显的问题,而是要考虑有多少个轨道,有某种特定的态函数,或者特定的轨道名字。
Flanders, since when do you like anything cool?
弗兰德,你什么时候也开始赶时髦了?
So ever since then and when I came back to Princeton, then we formed a center to study those problems.
所以从那以后,在我回到普林斯顿大学时,我们组成了一个中心研习这些问题。
They live much longer lives and they live to die of something else and the leading causes of death currently haven't changed very much since 1997 when this data was published: they die of heart disease and cancer primarily.
人们活的更久了,不过会死于另一些疾病,如今导致死亡的主要原因,并没有太大的变化,自一九九七年有相关数据公开开始,其显示人们主要死于心脏病和癌症
And runners proved the doctors and scientists-- proved that they were right and ran the mile in two seconds and 4 minutes, one second, but no runner could run the mile in under 4 minutes, ever since the mile was actually timed-- when they started to time runs.
跑手们证明了医生和科学家…,证明了他们是对的,一英里跑四分钟两秒,四分钟一秒,但没有跑手能少于四分钟,从一英里跑计时以来-,当人们开始计时跑时。
The trouble is, you just don't know when that explosion took place, and since there are several periods in this general area that we're talking about now, in which something big happened, some great change takes place, it turns out different people want to have their explosion at different times.
问题是,你不了解火山爆发的,确切时间以及这种爆发,在这个区域又延续了很多个时期,这些时期发生了许多重大事件和重大变化,结果就是不同人对,火山爆发的时间推测各不相同
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