请教几个词的意思,跟石化有关? A method for improving the cetane rating of distillate and diesel boiling range fractions by subjecting a feed stream derived from a naphthenic crude boiling in the distillate or diesel boiling range to a membrane separation process to produce a permeate rich in recovered C6 to C16 aromatic materials and a retentate of reduced C6 to C16 aromatics content suitable for use as enhanced cetane diesel or diesel blend stock, wherein the membrane separation process employs a membrane formed from a dianhydride, a diamine, an epoxy cross-linking agent, and a difunctional dihydroxy polymer, optionally cast on a support material. 请问红色的词和词组应该怎么翻译呢? 查看更多3个回答 . 5人已关注