1·The two main classes of petrochemicals are olefins and aromatics.
石化的两类主要产品是烯烃和芳烃。
2·The olefins, such as ethylene and propylene, are formed from petroleum gas or from cracking of larger hydrocarbons. Ethylene is used to make polyethylene e.g.
烯烃主要是来自石油气或大分子的碳氢化合物裂解，如乙烯，丙烯。
3·Polymers of propylene or of other olefins, in primary forms.
初级形状的丙烯或其他烯烃聚合物。
4·Polymers of vinyl chloride or of other halogenated olefins, in primary forms.
初级形状的氯乙烯或其他卤化烯烃聚合物。
5·ExxonMobil chemical Company licenses a multitude of technologies covering a broad range of petrochemicals from aromatics to olefins and polymers.
埃克森美孚化工可对众多技术进行技术转让，覆盖了石油化工的多个领域，从芳烃、烯烃再到聚合物。