Comparing the star shaped graph of unknown gasoline with those of known commercial gasolines can determine where the gasoline is from.

将绘制好的西安市面上随机购买的几种未知汽油星状图进行对比，成功地确定了其油品来源。

This process, commercialized in 1967 operates in conjunction with a naphtha reforming process to produce high octane gasolines from naphthas.

它于1967年商业化，与石脑油重整工艺结合从石脑油中生产高辛烷值汽油。

The butenes are derived from petroleum refinery gases and are used in making butadiene, high-grade gasolines, and as sources of synthetic chemicals.

丁烯是从石油炼厂气衍生而来，用于制造丁二烯、高级汽油和合成化学品。

The effects of gasoline sulfur and olefin content on vehicle exhaust emissions were investigated through a fleet of 5 vehicles tested with 8 different gasolines.

通过5辆车组成的车队在各种指标不同的8种燃油上进行尾气排放试验，研究了汽油中硫含量和烯烃体积含量的变化对汽车尾气排放的影响。