塑料瓶的主要材料一般是PP（聚丙烯）及少量的PET（聚对苯二甲酸乙二醇酯）．（利用废旧塑料瓶为原料制作衣服需要经历一个复杂的物理化学过程．）
The use of waste plastic bottles as textile material to make clothes is a complicated physical process.
塑料瓶的主要材料一般是PP（聚丙烯）及少量的PET（聚对苯二甲酸乙二醇酯）．（利用废旧塑料瓶为原料制作衣服需要经历一个复杂的物理化学过程．）
The use of waste plastic bottles as textile material to make clothes is a complicated physical process.
