1. He was attempting to manufacture quinine from aniline, an inexpensive and readily available coal tar waste product. 他试图用苯胺批量制造奎宁，苯胺是一种廉价且容易获得的煤焦油废料。
2. All living cells also produce carbon dioxide as a waste product. 扫数活细胞也都产生作为废料的二氧化碳。
3. The main waste product, oxygen, they emit through their stomata in a watery belch. 而光合作用中分解出的氧粒子，最终形成了氧气，作为“加工废料”，随着水分的蒸散通过气孔排放出去。
4. And once you've taken that out you're left with a waste product called bagasse. 并且，一旦把糖分取出，就只剩下称之为甘蔗渣的废料。
5. It is also a waste product that would otherwise be burned, and is therefore cheap. 稻草还是一种最后要被烧掉的废弃物，因此很便宜。
