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,...
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...