If you ever try to go beyond the boundaries of an array, as we'll soon see, bad things happen.
如果你试着超出了数组的界限,我们将看到,会发生坏事情。
For those of you don't know what that is it's simply an instrument that counts radioactive particles in the air, and MIT now that you're at MIT, you'll all have a chance to see one first hand if you're ever in any of the labs, especially in the chemistry or bio labs.
不知道它是什么,它就是一个简单的,计算在空气中放射粒子数目的仪器,你们现在来了,如果你们在实验室里工作的话,尤其是化学和生物实验室,你们有很多机会亲手用到它。
You see these big blanks, because nobody had ever been there.
那里在地图上是大片空白,没有人到过那里
You can see that it has reached the lowest level ever.
可见基本接近历史最低了
Everyone would do that, no one would ever hold some other portfolio ... because you can see that this line is the lowest-- it's far--you want to get to the left as far as possible.
所有人都会这么做,没人会选择其他的投资组合,因为你们可以看到这条线是最低的-,你希望他越靠左越好。
So, if you're looking back, say, from the end of the nineteenth century, it's not easy to see, but you can see these-- don't ever think that history runs on railroad tracks, and all you need is the timetable to show when modernization shows up.
所以,当你回顾历史,从十九世纪的末尾开始,虽然不太容易,但还是可以看出...,别以为历史是在固定轨道上行进的,别以为你只用拿时刻表,就知道新时代什么时候来临
I just wanted to point out that although you see these chlorine atoms in these drugs, in fact, I don't think I've ever seen an acid chloride in a final pharmaceutical product or drug that we take, and the reason is because they're so reactive that you wouldn't want to have that in something you digest.
我只是想指出一点,那就是尽管你在这些药物中看到了氯原子,实际上,我想我从来都没有在一个,成品的药用产品或者药物中见到过酰氯,这原因是因为它们太容易反应了,你不会想让它们出现在你要消化的东西中。
So if you look at the energy diagram, what we see is that the 4 s orbitals are they're just ever so slightly lower in energy than the 3 d orbitals.
如果你看能量图,我们看到的是4s轨道,他们仅仅比3d轨道,能量低一点点。
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