英语语法分析

The critical parameters of 1-pentene, 3-methyl-1-butene, 1-hexene and isopropyl acetate were determined.

测定了1-戊烯、3-甲基-1-丁烯、1-己烯和乙酸异丙酯的临界参数。

The olefin cracking and the pentene isomerization over zeolites are two very important reactions in the petrochemical industry.

分子筛催化的烯烃裂解以及戊烯异构化是两个重要的石油化工过程。