聚丙烯

例句：

1. 1. This polypropylene bag is durable and lightweight.
   这个聚丙烯袋耐用且轻便。
2. 2. Polypropylene is commonly used in the production of plastic products.
   聚丙烯常用于生产塑料制品。
3. 3.The polypropylene pipes are resistant to corrosion and can withstand high temperatures.
   聚丙烯管道耐腐蚀，耐高温。