图书馆将小说分为几个主要类型，并在每个类型下设置了更详细的子类别。

The library divides novels into major genres and further organizes them into ___subcategories for more specific classification.

在图书馆分类系统中，小说又被细分为多个子类别。

In the library's classification system, fiction is further divided into several ___subcategories.