noun 下载 🔗分享 地基，基础结构. The supporting part of a structure (either physical or organizational; the foundation). Examples : "The school's substructures, including the foundation and supporting walls, were reinforced during the summer renovation. " 学校暑期翻修期间，对地基和承重墙等基础结构进行了加固。 structure organization part building 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 道碴，路基石。 The earth or gravel that the railway tracks are embedded in. Examples : "After the heavy rains, engineers inspected the substructures of the railway line for any signs of erosion that could cause a derailment. " 大雨过后，工程师们检查了铁路线的道碴和路基石，看是否有被侵蚀的迹象，以防止发生脱轨事故。 material geology structure building technical 与AI对话词汇游戏阅读练习
