be subdivided into

The compound was subdivided into four living areas.

那个区域被划分成四块居住小区。

Genera may be subdivided into subgenera, and also, especially in plant taxonomy, into sections, subsection, series, and subseries.

在植物分类学中，属一般可再分为亚属。同样可一步分为组、亚组，系、亚系等。