The extraction of penicillin G with petroleum sulphoxide and di - isooctyl.系统研究了亚砜类萃取剂石油亚砜和二异辛基亚砜萃取青霉素G的性能.A gas chromatography method for the quantitative analysis of isooctyl acid was introduced in this paper.摘要建立了异辛酸合...
We all start with preconceived notions of what we want from life.我们开始时都对自己想从生活中得到什么抱有一些预想。I'd had a few notions about being a journalist.我以前曾有过想当记者的念头。a political system based on the notions of equality and liberty建...
Jeans a powerful egalitarian message, but are far more likely to a sartorial deathtrap for politicians.政客们穿上牛仔裤是传递亲民的讯息, 但也更容易犯穿衣禁忌.The soldiers had to remain in a deathtrap salient for most of the rest of the war.随后的战争中...