1·These fabrics are made of such fibers as polypropylene, olefin, polyester, nylon, and acrylic.
这些织物使用的纤维有：聚丙烯、烯烃、涤纶、尼龙以及丙烯腈纤维。
2·Robert H. Grubbs, an American chemist, was born in Kentucky in 1942. In 2005, he received the Nobel Prize in Chemistry for his work on olefin metathesis.
罗伯特·格拉布，美国化学家，1942年出生于肯塔基州，2005年因“烯烃复分解反应”的研究而获得诺贝尔化学奖。
3·High gaseous olefin yields are the main features of DCC and MGG technologies.
多产气体烯烃是DCC和MGG工艺的主要特点。
4·The light constituents flow upward to the catalyst zone, where the selective hydrogenation of butadiene is carried out together with desulfurization and some olefin saturation.
轻组分向上流至催化剂段，在那里丁二烯选择性加氢、脱硫和一些烯烃的饱和同时进行。
5·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。