The answer is--this goes way back-- it's an old tradition and they used to have to do this by hand.

答案要追溯到很久之前,这是个古老的传统,他们过去用手工计算

耶鲁公开课 - 金融市场课程节选

And so frequently what we try and do is, we take a new problem and map it onto an old problem so that we can use an old solution.

我们经常做的一件事就是，我们处理一个新问题时,把它归结为一个老问题,以便我们能采取老的解决方式。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, it's not like an adult with autism is like a three-year-old or a two-year-old.

所以并不是患有孤独症的成年人,会表现的如同两三岁儿童一样

耶鲁公开课 - 心理学导论课程节选

We're going to take up this question initially of it's an old, old, old American question how peculiar, or distinctive, or different is the American South?

我们要继续探讨一个问题,一个十分古老的美国问题,美国南方究竟多么特殊,多么与众不同

耶鲁公开课 - 美国内战与重建课程节选

Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.

系统对外界做功的符号为负,这就是我们,在本课中的规定，纯粹出于统一符号的需要，有些教科书中，可能会使用相反的符号规定,注意不要混淆了，这门课上,我们将一直使用。

麻省理工公开课 - 热力学与动力学课程节选

I said earlier that this is an old idea, I mean it goes back into the eighteenth you can find all kinds of examples of these stereotypical conceptions of the South in French, British visitors.

我之前说过这是一个陈旧的观点,这是十八世纪的观点,你能找到各种各样的例子,说明在法国,英国的游客心中,存在对于南方的偏见

耶鲁公开课 - 美国内战与重建课程节选