poly-

例句：

1. 1. The polycarbonate materialis strong and lightweight.
   聚碳酸酯材料既坚固又轻便。
2. 2. Polystyrene iscommonly used in packaging due to its highstrength and low density.
   由于其高强度和低密度，聚苯乙烯常用于包装。
3. 3.The polypropylene plastic is widelyused in the production of food containers dueto its excellent thermal and chemical resistance.
   聚丙烯塑料因其出色的热和化学抵抗性而被广泛用于食品容器的生产。