至于包装材料，有些国家使用聚乙烯膜。但许多国家则使用蜡纸或防油纸。

As for the materials for packaging, some countries are using polyethylene.

youdao

至于包装材料，有些国家使用聚乙烯膜。但许多国家则使用蜡纸或防油纸。

As for the materials for packaging, some countries are using polyethylene.

youdao