So I could do it empirically, but I don't want to do that typically, it's just not a great way to get at it. And so in fact, what we want is exactly what the young lady said.
我可以凭借经验来做,但是我不想那么来,因为那并不是一种好方法,并且实际上,我们想要的和这位年轻女士说的确实相同。
I'm not going to tell you what you want to do except to say, you would never pick a point below the minimum variance portfolio, right?
我不是教你怎样去组合,当然了,你不会选择一个,曲线上最小方差点以下的资产组合,对吧?
OK, not a quiz for points or anything, don't freak out, but I do want you to tell me who these people are. So, what about this person?
我们的课程将由一个小测试开始,别紧张,这不记录分数的,但我希望你们能告诉我这些人是谁?
So the exceptions are useful when you want to have the ability to say, I expect in general this kind of behavior, but I do know there are some other things that might happen and here's what I'd like to do in each one of those cases. But I do want to make sure that I don't let a value that I'm not expecting pass through.
所以当你希望有能力说,我希望一般是这样的行为,异常是很有用的,但是我明白还有一些其它的情况可能发生,我希望对每一种情况都这么做,但是我跟希望能保证,没有让一个预期之外的情况漏过去。
I may not want to do the full range of this, but I may decide I have to use a lot of gigabytes of space in order to do a trade off.
哈希成一个整数,我不想完整的去做这件事,但是我可以想像我需要用许多G的空间,去完成空间和时间之间的权衡。
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