Plasticizer DOTP was prepared from ethylene glycol residue (major component is PET low polymer) using single step process in which alcoholysis and ester interchange were combined.
以聚酯生产中产生的下脚料——乙二醇残渣(主要含PET低聚物)为原料，采用辛醇合并醇解、酯交换一步法工艺，合成了增塑剂DOTP。
Cancer in humans is the result of a multi-gene, the combined effect of multi-step process, and tumor-sup-pressor genes play an important role in this process.
人类肿瘤的发生是多基因、多步骤共同作用的结果，抑癌基因在这一进程中扮演着重要的角色。
Cancer in humans is the result of a multi-gene, the combined effect of multi-step process, and tumor-sup-pressor genes play an important role in this process.
人类肿瘤的发生是多基因、多步骤共同作用的结果，抑癌基因在这一进程中扮演着重要的角色。
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