expanded polystyrene
noun [ U ] uk/ɪkˌspæn.dɪd pɒl.ɪˈstaɪ.riːn/ us/ɪkˌspæn.dɪd pɑː.lɪˈstaɪ.riːn/
(用于包装的)泡沫聚苯乙烯
a light plastic that contains gas and is used for wrapping things in before putting them in boxes
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