polycyclic compound 多环化合物
PAC Polycyclic aromatic compound 稠环芳烃 ; 多环芳烃
polycyclic aromatic compound 多环芳香烃化合物
And there are 8 kinds of main components in liquid fuel, which belong to higher olefine hydrocarbon, acetylene series, heterocyclic compound and polycyclic organic matter.
从收集到的液体燃料中检测出8种主要物质，分别为高级烯烃、炔烃、杂环化合物和多环有机物。
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