【正确答案】The use of waste plastic bottles as textile material to make clothes is a complicated physical and chemical process.

【答案解析】 原句为“主谓宾”结构，主语为“利用废旧塑料瓶为原料制作衣服”，英译时将动词“利用”转化为名词“the use of”：“to make clothes”是动词不定式作material的补语，表目的。