2楼带下沉式庭院图

Quick answer：

The term '2楼带下沉式庭院图' refers to a floor plan of the second level of a building featuring a sunken garden. In this context, a 'sunken garden' is a garden that is below ground level, often creating a sense of privacy and intimacy. Floor plans are essential for architectural design, as they show the layout and dimensions of spaces within a building. They help visualize the spatial organization and can be used to ensure efficient use of space, structural integrity, and aesthetic appeal.