In General, the mechanical properties of composites made from recycled plastic blends were inferior to those made from virgin plastic blends, especially in elongation break.

总的来说，混合废旧塑料制备的复合材料的力学性能要低于纯塑料混合物制备的复合材料，尤其是拉伸断裂伸长率。

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But since then plummeting prices for virgin paper, plastic and fuels, and hence also for the waste that substitutes for them, have put an end to such visions.

但随着纸5、塑料、燃料价格下跌，可替代他们的垃圾价格也随之下跌，这种想法也就中断了。

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The inexpensive extra-virgin oil started to smell of rubber and plastic almost as soon as it became warm, and fumed at 350 degrees.

便宜的特级纯橄榄油一加热到350度时就冒烟，并开始产生一种橡胶和塑料的气味。

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But since then plummeting prices for virgin paper, plastic and fuels, and hence also for the waste that substitutes for them, have put an end to such visions.

ECONOMIST: Talking rubbish