| 1. | The petroleum hydrocarbon is called hexane .
己烷是一种石油碳氢化合物。 |
| 2. | Two schools of thought regarding the origin of petroleum exist .
关于石油的成因有两大学派。 |
| 3. | Air photos are widely used in the search for petroleum .
航空象片广泛地应用在石油普查方面。 |
| 4. | A cowhand herds cattle past a petroleum processing plant .
一个牧牛人赶着一群牛在一家石油加工厂附近经过。 |
| 5. | Adulteration with petroleum is permitted in certain circumstances .
在某种场合下，允许与石油掺合起来使用。 |
| 6. | But it was actually the automobile that made petroleum so very useful .
实际上使石油变成那么有用的是汽车。 |
| 7. | Naturally occurring rock oil is referred to as crude oil or petroleum .
天然形成之石油，我们称作原油或石油。 |
| 8. | Light petroleum distillate, generally known as naphtha, was the logical choice .
轻石油馏分，如石脑油是合乎逻辑的选择。 |
| 9. | Petroleum or oil photogeology is primarily an evaluation of bedrock conditions .
石油或石油摄影地质主要是研究基岩情况的。 |
| 10. | Similar problems are encountered throughout the whole range of petroleum products .
在整个石油产品范围内都遇到类似的问题。 |
