pagings of the various sections

例句：

1. 1. The book has 500 pages.
   这本书有500页。
2. 2. We need to check the pagings before we start reading.
   在开始阅读之前，我们需要检查页码。
3. 3.The library has a large collection of books with different pagings.
   图书馆拥有大量不同页码的书籍收藏。