短语词组短語back -bone style arch structure tent 脊骨式拱架帳篷Back -bone Class 支架類Long -side back-bone network 長邊骨架網Back bone fiber 樓間光纜to the backbone 完完全全；徹頭徹尾backbone network 中樞網絡，骨乾網backbone enterprise 骨乾企業 返回 back bone