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BNC: 17557 COCA: 19514
polyethylenenoun [ U ]uk/ˌpɒl.iˈeθ.əl.iːn/ us/ˌpɑː.liˈeθ.ə.liːn/ US also mainly UK polythene

a light, usually thin, soft plastic, often used for making bags or for keeping things dry or fresh聚乙烯

a polyethylene bag聚乙烯塑料袋
They covered the broken windows with sheets of polyethylene.他们用塑料薄膜把打坏的窗户挡起来。

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