general purpose polystyrene

例句：

1. 1. This type of polystyrene is widely used in packaging industry.
   这种类型的聚苯乙烯在包装行业广泛使用。
2. 2. Polystyrene is a popularmaterial for making toys and other household items.
   聚苯乙烯是一种受欢迎的材料，用于制作玩具和其他家用物品。
3. 3. Thenew polystyreneproduct has been tested and foundto be environmentally friendly.
   新型聚苯乙烯产品经过测试，被证明是环保的。