Acrylic resin ( ACR ), as an impact modifier for R - PVC, was synthesized by latex interpenetrating poly - mer network technique.采用乳液聚合技术合成了硬聚氯乙烯(R - PVC)抗冲击改性剂丙烯酸酯类聚合物 ( ACR ).The copolymer latex of butyl acrylate and V...
亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.偶氮杂环丙烷是一类重要的 、 环内张力颇大的化合物.The diazirines are interesting , highly strained ring systems.在最佳反应条件下,环丙烷羧酸异丙酯的产率达92%.Under the opti...
Charlie Nelson has nurtured fine sprinters.查理·纳尔逊已经培养出了相当优秀的短跑选手。He has been the trailblazer and given British sprinters the belief that we are able to take on and beat the world's best.他一直是开路先锋，让英国短跑选手相信我们能与世界上最好的运...
One should keep one's reputation free from all slurs.人应该保持名誉不受责备.Racial slurs, racial jokes, all having to do with being Asian.种族主义辱骂, 种族笑话, 都是跟亚裔有关的.I try to be indifferent to the slurs of my enemies.我尽力对敌人的诽谤置之不理....
搞研究不让动物遭点罪是不可能的.It's impossible to do research without inflicting some pain on animals.让动物跑.Let animals run wild.别让动物到厨房里.Keep animals away from the kitchen....
Having to get up at three o'clock every morning was the least of her worries...她发愁的事多着呢，相比之下，每天早上3点就要起床根本就不算什么。What worries some of us is that the Prime Minister may feel simply unable to do a somersault...使我们中间的一些人...