1·Crude oil is the world's most important commodity.
原油是世界上最重要的商品。
—— 《牛津词典》
2·Thousands of gallons of crude oil were spilled into the ocean.
成千上万加仑的原油泄漏，流进了海洋。
—— 《牛津词典》
3·The advent of new technologies has added about 4.2 million barrels per day to the crude oil market.
新技术的出现使原油市场每天增加了约420万桶的交易。
4·Petroleum, consisting of crude oil and natural gas, seems to originate from organic matter in marine sediment.
石油由原油和天然气组成，它们似乎来源于海洋沉积物中的有机物质。
5·At a refinery, the crude oil from underground is separated into natural gas, gasoline, kerosene, and various oils.
在炼油厂，从地下提取的原油被分离成天然气、汽油、煤油和各种其他类型的油。