And so this chapter of the book aims to introduce each of these distributions, or each of the most common distributions, which are used.

这本书的这一章旨在介绍这些发行版中的每一个 或每一个常用的发行版。

Right off the bat, we can see that it kind of avoids this sector up here, but we don't know if that is a common distribution.

立即， 我们可以看到它有点避开了这里的这个扇区，但我们不知道这是否是一个常见的分布。