这个机构里错综复杂，你永远搞不清到底是怎么回事。

There are wheels within wheels in this organization—you never really know what is going on.

《牛津词典》

他跟着她进了牛栏，想看看到底是怎么回事。

He went with her into the cow-house, to try and see what was the matter.

youdao

到底是怎么回事？

Whatever can be the matter?

youdao

What's going on here, so go back to your Economics 115 or 150, if you took either of those courses.

这到底是怎么回事,回顾一下经济学115或者150,如果你们有人学过这些课的话

耶鲁公开课 - 博弈论课程节选

And this is all in the realm of literary interpretation: Read the story closely, see if you can figure out what's going on here.

它们都是在文学方面的解读：,仔细阅读，看你能否明白到底是怎么回事。

耶鲁公开课 - 旧约导论课程节选

So I now want to work through an example where we can see this happening.

现在我想跟大家一起做一个例子,来明白到底是怎么回事。

麻省理工公开课 - 计算机科学及编程导论课程节选