So a bit of uninteresting math, a bit of focus on sizes of types, but any questions on syntax or concepts thus far before we now put this to the test?

一些比较无趣的数字，一些关于类型的大小,在我们现在进行试验之前,你们对这其中的语法或概念有什么问题吗？

哈佛公开课 - 计算机科学课程节选

Maybe you should leave before it gets too dark, so that you don't have to walk too far.

也许你该在天黑之前就动身回去了，这样你就不用走那么远了。

How long实战 - SpeakingMax英语口语达人

Most of us think we have so far to go before we can answer questions like Huxley's question.

多数心理学家与哲学家都认为在能够回答,诸如赫胥黎提出的这类问题之前,还需要做大量的研究才行

耶鲁公开课 - 心理学导论课程节选

So, Lewis structures are really a model for a way to think about what the valence electron configuration is, and as I said, it's not based on quantum mechanics, it's something that Lewis observed far, far before quantum mechanics were discovered.

路易斯结构实际上是一个用来考虑价,电子排布的模型，而就像我说的，它并不以量子力学为基础，而是路易斯在以前发现的,在量子力学出现很早前。

麻省理工公开课 - 化学原理课程节选

It's a good question. As far as Accounting here, it's because I had done Accounting before.

问得好。现在会学会计是因为我之前做过会计。

为什么是会计学呢？ - SpeakingMax英语口语达人

And, in fact, a computer program has come up with a proof that, as far as was known, nobody in the world had ever come up with before.

而实际上,电脑程序的证明方式,据目前所知,是前人们从未曾提出过的

耶鲁公开课 - 死亡课程节选

So what we think we know derives chiefly from archeological evidence, which is before writing--mute evidence that has to be interpreted and is very complicated, and is far from secure.

我们目前所认为的史实,主要都是从考古证据中所得,这些无声的证据出现于文字记录之前,因此就需要繁复的考证及解读,这些考证未必可靠

耶鲁公开课 - 古希腊历史简介课程节选