化学制品 基本例句 chemicalchemicals 石油化工产品现在已占所有化学制品的四分之一，十年后预计这个数目还要加倍。Petrochemicals today account for one fourth of all thechemicalsmade, in ten years this amount is expected to double. 石油化学制品从石油或天然气中提炼出的化学产品Achemicalderived from petroleum or natural gas.