Batteries made from other cheap materials-such as iron or the organic compounds found in rhubarb-could lead to massive-scale energy storage, letting whole cities run on solar power through the night.

从其他廉价的材料，如铁或从大黄中提取的有机化合物制成电池，可以实现大规模储能，让整个城市夜间的运行全部使用太阳能发电。

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Typical poisons are organic lead and silicon compounds.

典型的毒物是有机铅和硅化合物。

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Catalytic converters reduce carbon monoxide, oxides of nitrogen, and volatile organic compounds in emissions and necessitated the use of lead-free fuel.

催化转炉减少了一氧化碳，氧化氮和挥发性有机混合物等的排放，而且无铅燃料的应用也当成为必要。

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The breath-test technology relies on the idea that the biology of tumours can lead to the production of specific "volatile organic compounds", combinations of chemicals unlikely in a healthy person.

BBC: 'Promising results' for bowel cancer breath-test