相比之下，人们可以从太空中看到在西班牙数百英里长的用来种植西红柿的聚乙烯薄膜。
In contrast, the hundreds of miles of polythene sheeting used to produce tomatoes in Spain can be seen from space.
作为另外一种预防杂草的防护措施，你可以一直使用一层厚重耐磨的聚乙烯底垫。
As an additional safeguard against weeds you can always use an underlay of heavy duty polyethylene.
机翼是由铺在碳纤维框架上的聚乙烯薄膜制成的。
The wings are made of a polythene film stretched over a carbon fiber frame.
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