短語詞組短語Optimal substructure 最優(yōu)子結(jié)構(gòu);優(yōu)化子結(jié)構(gòu)derrick substructure [油氣]井架底座substructure height [機]底座高度substructure cost 地下工程造價dislocation substructure 位錯亞結(jié)構(gòu)piece substructure 整體結(jié)構(gòu)底座spatial substructure 空間子結(jié)構(gòu)connecting substructure 連接子結(jié)構(gòu)prismatic substructure 棱柱式下部結(jié)構(gòu) 返回 substructure