IsocrackingWiktionary 原文构词拆分iso-前缀Same, identical. · Equal; equivalent.+cracking词根/词干词源说明A proprietary name, from iso- + cracking; developed in 1959.释义（英文）名词 NounA process that uses catalysts to rearrange the existing molecules of heavy fuel oils to remove sulfur and convert low-value fuel oils into higher-yield products such as gasoline.