短語(yǔ)詞組短語(yǔ)roadbed work area 路基工作區(qū)roadbed in reservoir area 庫(kù)區(qū)路基roadbed of frost soil area 凍土地區(qū)路基Roadbed soil in seasonal area 季凍區(qū)路基土subsiding area under roadbed 路基下空區(qū) 返回 roadbed area