The progresses in five - membered heterocyclic metallocene analogic complexes and their application in olefin polymerization are reviewed.综述了五元杂环类茂金属配合物的研究进展及其在烯烃聚合中的应用....
I want to go to a coed school.我要上男女同校的学校.Is your school coed?你们学校是男女合校 吗 ?Instead of coed dormitory, I chose to live in a fraternity house off campus.我选择住在校外的兄弟会宿舍代替男女生宿舍....
Pulling out to overtake, the car collided head-on with a van.越线超车时，轿车和一辆厢式货车迎面相撞。He pulled out to overtake a truck.他驶出车流，以超过一辆卡车。I had to walk very fast to overtake you.我不得不快走才能赶过你....
'氰'.''基一种单价基因,''.'氯'. ''化苯乙酮, 存在于简单的和复杂的氰化物中.A univalent radical , CN, found in simple and complex cyanide compounds.降低反应温度,提高了苯乙酮的收率.Thus , this reduced temperature of r...
他的儿子、兄弟和侄子都是他的左膀右臂，都配备了武器。His sons, brother and nephews were his armed sidekicks.我到达的时候，侄子们围着我嘘寒问暖。When I arrived my nephews made a big fuss of me.“把她从你的遗嘱中删去，”他的侄子催促道。"Cut her out of your will," urged his nephew....