polystyrene
noun [ U ] uk/ˌpɒl.ɪˈstaɪ.riːn/ us/ˌpɑː.lɪˈstaɪ.riːn/ (US usually trademark Styrofoam)
聚苯乙烯（泡沫塑料）
a light, usually white plastic used especially for putting around delicate objects inside containers to protect them from damage, or for putting around something to prevent it from losing heat
polystyrene cups/plates 聚苯乙烯杯／盘
The ceiling was covered with polystyrene insulation tiles. 天花板上覆盖着聚苯乙烯隔热瓦。