a lightweight thermoplastic; used especially in packaging and insulation
同义词：polythene
polyethylene详细解释
pol.y.eth.yl.ene n.（名词）A polymerized ethylene resin, used especially for containers, kitchenware, and tubing, or in the form of films and sheets for packaging.聚乙烯：一种聚合的乙烯树脂，尤用于容器、厨房器具和各类管中，或以卷和片的形式供包装使用
