n.聚乙烯
Polyethylene is an excellent barrier to water vapor. 聚乙烯保水蒸汽的性能良好。
This order shall be packed in cartons with polyethylene tops. 这批货的包装是用顶部带有聚乙烯的纸箱。
It virtually consists of an empty chamber completely lined with polyethylene. 它实际是一台完全用聚乙烯作衬里的空腔室。