我们在田野里发现了一处兔子挖的错综复杂的洞穴网。

We found a complex network of ___warrens dug by rabbits in the field.

这座老旧公寓楼像个迷宫，走廊曲折，房间密集。

The old apartment building was a ___warren of winding corridors and tiny rooms.