polythene
noun [ U ] mainly UK uk/ˈpɒl.ɪ.θiːn/ us/ˈpɑː.lɪ.θiːn/ (US usually polyethylene)
聚乙烯
a light, usually thin, soft plastic, often used for making bags or for keeping things dry or fresh
a polythene bag 聚乙烯塑料袋
They covered the broken windows with sheets of polythene. 他们用塑料薄膜把打坏的窗户挡起来。