(一).What's this all about? 到底怎么回事？
原音重现：

A：What's this all about?
到底怎么回事？
B: The police need to ask you some questions.
警察要问你几个问题。

(二).What's the deal? 到底怎么回事？

原音重现：

A：I thought we were leaving. What's the deal?
我以为我们就要出发了，到底怎么回事？
B: I decided to stay a while longer.
我决定再停留一段时间。