multilevel structures的用法和樣例：
例句
- Pdf- Three structures and the module technology realize the staff data management system pdf.
三層結構及組件技術實現員工數據管理系統。 - Permeability of basalt fibre reinforcements with two different structures that are laminated mainly depends on fabric with lower permeability.
兩種不同結構的玄武岩增強材料疊合在一起的鋪層結構的滲透率主要取決於滲透率較小的增強材料的滲透率。
