substructure

US /ˈsʌbˌstrʌk.tʃɚ/
UK /ˈsʌbˌstrʌk.tʃɚ/
"substructure" picture
1.

下部結構, 基礎, 底層結構

an underlying or supporting structure

:
The engineers carefully designed the substructure of the bridge.
工程師們精心設計了橋樑的下部結構
The building's substructure needs to be strong enough to support the entire weight.
建築物的下部結構必須足夠堅固以支撐全部重量。