n.基础，下部结构，下层建筑

The substructure of the bridge is made of reinforced concrete.
桥梁的下部结构由钢筋混凝土制成。
The new skyscraper has a steel substructure that ensures its stability.
这座新摩天大楼拥有确保其稳定的钢制基础结构。
The archaeologists uncovered an ancient substructure buried beneath the city square.
考古学家在城市广场下发现了一座古代的地下建筑。
The building's substructure had to be reinforced due to soil erosion.
由于土壤侵蚀，建筑物的基础结构必须得到加固。
The substructure of the highway consists of multiple layers of compacted gravel and asphalt.
高速公路的下层结构由多层压实的砾石和沥青组成。
The designer proposed an innovative substructure for the off-shore wind farm to withstand harsh marine conditions.
设计师为海上风力发电场提出了一个能抵御恶劣海洋环境的创新基础结构。
The renovation project involved exposing and restoring the historic substructure of the castle.
翻新项目包括揭露并修复城堡的历史性基础结构。
The engineer carefully inspected the substructure for signs of corrosion or damage.
工程师仔细检查基础结构是否有腐蚀或损坏的迹象。
The substructure of the tunnel was designed to resist seismic activity.
隧道的基础结构设计能抵抗地震活动。
After the storm, engineers assessed the integrity of the bridge's substructure.
风暴过后，工程师们评估了桥梁基础结构的完整性。