A series of ~1 H NME decoupling experiments then led to the carbon skeleton of koumine.2的相对构型系通过~1HNMR分析而判断.Simply by adding an additional gas such as acetylene ( C 2 H 2 ), you can create chromium carbonitride.简单地加入另外的气...
Edwin H. Conger was envoy extraordinary and Minister Plenipotentiary.埃德温·H.康格是特命全权公使。By the third lap Kinkead had touched 289 m.p.h.到第三圈时，金基德的车速达到了每小时289英里。The W.H.O. safety standard for ozone levels is somewhere about a...