Utilising the cheap and plentiful coal tar that was an almost unlimited byproduct of London's gas street lighting, the dye works began producing the world's first synthetically dyed material in 1857.

煤焦油是伦敦煤气道路照明几乎无限的副产物，利用便宜量大的煤焦油，染厂于1857年开始生产世界上第一种合成染色材料。

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Plastic byproduct left behind in a print job can sometimes be reused, but more typically, its material properties are corrupted and therefore no longer suitable.

塑料副产品在打印作业中留下的，有时可以重复使用，但是更典型地，它的材料性能损坏，因此不再合适。

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Plastic byproduct left behind in a print job can sometimes be reused, but more typically, its material properties are corrupted and therefore no longer suitable.

塑料副产品在打印作业中留下的，有时可以重复使用，但是更典型地，它的材料性能损坏，因此不再合适。

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