in·fra·struc·ture /ˈɪnfrəˌstrʌkʧɚ/
  下部構造,基礎下部組織
  infrastructure
       n 1: the basic structure or features of a system or organization
            [syn: substructure]
       2: the stock of basic facilities and capital equipment needed
          for the functioning of a country or area; "the industrial
          base of Japan" [syn: base]