You can also look for special recycling drop-off locations for odd items like batteries or styrofoam.

你也可以为电池或泡沫聚苯乙烯等奇怪的物品寻找特殊的回收地点。

For example, polystyrene turns into small pieces with time.

例如, 聚苯乙烯随着时间的推移会变成块。

By contrast, early laboratory experiments used sterile spherical beads of just one type of plastic, polystyrene, which were bigger than the nano-size range.

相比之下，早期的实验室实验仅种塑料——聚苯乙烯的无菌球形珠子，其尺寸大于纳米尺寸范围。

What throws a spanner in the works is the layer of polyethylene that makes the cup waterproof, and the lid, which is most often made of polystyrene.

在工作中投入扳手的是杯子防水的聚乙烯层， 以及通常由聚苯乙烯制成的盖子。