我之所以要这样做是因为在座的各位并不都是物理学家。

I have to do this since all of us here are not physicists.

youdao

这样做是有风险的，因为要实现在四年内将赤字减半的承诺，我必须削减给中产阶级减税的提案。

It was risky, because in order to keep my pledge to cut the deficit in half in four years, I had to trim the middle-class tax-cut proposal.

youdao

我没有忘记他的名字——不仅仅是因为他和我姓一样，而是他的故事每时每刻都在提醒我，我为什么要这样做，我能做的事情又是多么的少。

I have not forgotten his name - and not just because his last name was the same as mine. His story reminds me of why I do this work and how little I can really do.

youdao

3 So here what I'm doing is 17 divided by 13, but because of this parenthetical, , -- because of that parenthetical -- that has nothing to do with math; -- this is a programming language thing -- that is a casting operation.

所以这里我要做的是用17除以，但因为这样的题外话，因为那样的题外话-,还是没有做完这个数学题;,这是一个编程语言的东西-,那是一个计算操作。

哈佛公开课 - 计算机科学课程节选