substructure [ˈsʌbˌstrʌktʃɚ]

例句:

• Scotty's shimmering swollen slang speech sounding sinful sagacity's seamy substructure sanely sank such sins!
  来自SA
• a substructure of timber piles
  木桩下部结构
  
• The substructure is a box - on - box design for easy installation.
  采用无棚绳前开口型井架,整体起升, 低位 安装,方便快捷.
  
• Seepage is one of the ubiquitous problems in substructure work.
  地下工程结构渗漏是地下建筑物中普遍存在的问题.