One-level下沉式庭院实景

Quick answer：

A下沉式庭院 refers to a courtyard that is sunken below the ground level of a building. It is a type of outdoor space that is partially or completely below the surrounding ground level. The term '实景' means 'actual scene' or 'real scene'. Therefore, '一楼下沉式庭院实景' refers to the actual or real scene of a sunken courtyard located on the ground floor of a building.