petroleum 与 oil 的区别?如题

petroleum 与 oil 的区别?如题 petrol,oil,petroleum,crude一样的吗,有何区别(种类,纯度 etc) 如何区别petro与petroleum Oil 与 Fuel 的区别? gas,gasoline,petrol,petroleum什么区别啊 petorl和petroleum有什么区别? petroleum和petrole 有什么区别 Oil control和control Oil 区别 关于一句话中代词的 指代部分.Oil is formed when organic material trapped in sediments is slowly buried and subjected to increased temperatures and pressures,transforming it into petroleum.请问这句话 中 into 前面那个 it 是指代 OIL与WTI是什么关系代表国际原油的OIL与WTI2者价格之间是什么关系? 请大虾帮忙看看下面句子里的as will做什么用处,是什么词性,这边应该有省略的部分吧?An oil pipeline agreement between the China National Petroleum Corporation and Russia's Rosneft Oil will be signed as will a draft agreeme essential oil 和pure essential oil有什么区别 oil的意思 车的engine oil 将下列国际组织与它们的英文名字和总部连起来联合国 International Olympic Committee 美国纽约 世界贸易组织 World Trade Organization 比利时布鲁塞尔欧洲联盟 Organization of Petroleum E oil oil Tonight i will play you some Mozart书上翻译的是,今晚上我给你们演奏莫扎特的乐曲.我觉得不是应该,play some Mozart for you,吗?the purpose of oil refinery is to refine crude petroleum中，to怎么理解啊？