石油提取：石油是从油页岩中提取出来的。油页岩又称油母页岩，是由沉积在浅海和湖沼中的腐泥转换而来的。它的原始物质除古代水生植物、孢子和花粉之外，还有若干动物质。
但是，巴西最大的风险在于提取深海油田石油的复杂技术努力可能会遭受挫折。
But the biggest risk for Brazil is any setback that might occur in the technically complex efforts to extract oil from deep-sea fields.
煤和石油都一样，在提取过程中出错，更具有发生爆炸的危险性。
Coal and oil have more in common than a tendency to produce explosions when mistakes are made in the extraction process.
通常，硅碳化合物通常由加热的沙子(通常由石英构成，或称二氧化硅)和石油或煤炭中提取的碳放在电气炉内反应而得到。
Normally, silicon carbide is produced by heating sand (which is made of quartz, or silicon dioxide) in an electric furnace with carbon made from oil or coal.
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