发生什么了， 珊，这到底是什么？

What happened Sam, what is it?

youdao

所以就开始想，'这到底是什么一回事？

So I began to think, 'What is going on?

youdao

如果这不是文化的话，那么很难说这到底是什么。

If that is not culture, it is difficult to think what is.

youdao

We started off talking about binary search, and I suggested that this was a log algorithm which it is, which is really kind of nice.

我告诉了你们这是一个对，数级的算法，这是很棒的,我们来一起看看这个算法到底做了什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's interesting to think about what's driving that and what it means for our health and for international politics.

到底是什么导致了这些变化以及,这对我们的健康和国际政治意味着什么,这些都值得我们思考

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And what you might have noted is although we described how to make predictions about these properties, I didn't talk too much about what it actually means, what the ramifications of these different properties are.

而大家可能已经注意到了我们描述了,如何对这些性质进行预言，但是我并没有讲这到底有什么意义，这些不同性质的分支是什么。

麻省理工公开课 - 化学原理课程节选