noun🔗Share下部構造, 基礎The supporting part of a structure (either physical or organizational; the foundation)."The old house needed repairs because the substructure, the wooden frame beneath the floor, was rotting. "古い家は、床下の木製のフレームである下部構造が腐っていたため、修理が必要だった。structurearchitecturebuildingorganizationpartChat with AIVocabulary GamePractice Reading
noun🔗Share路盤, 下部構造The earth or gravel that the railway tracks are embedded in."The train tracks felt stable because the construction crew had recently reinforced the substructure with fresh gravel. "建設作業員が最近新しい砂利で路盤を補強したため、列車の線路は安定しているように感じられました。materialgeologystructureChat with AIVocabulary GamePractice Reading
