The reactivity of wheat straw soda lignin ( WSSL ) can be improved by demethylation modification.麦草 碱木素在碱催化下经脱甲基改性可提高其反应活性.Benzbromarone was synthesized from salicylaldehyde by condensation with chloroacetone, reduction,...
Ecologists argue that the benefits of treating sewage with disinfectants are doubtful.生态学家认为用消毒剂处理污水是否有益值得怀疑。Other substances used to prevent disease or infection include disinfectants and germicides.用来预防疾病或感染的其它物质有消毒剂和灭...
I'd been a fool letting him snow me with his big ideas.我真蠢，居然被他的胡乱吹嘘给蒙蔽了。Lazy and incompetent police officers are letting the public down.懒惰兼无能的警官令公众失望。I'm going to stop letting drugs and drink rule my life.我决心...