Isomerization occur during bromine reaction, that is mean secondary allylic configuration changes into primary allylic configuration.在溴化反应过程中存在分子结构重排, 即溴代仲位烯丙基构型向溴代伯位烯丙基构型发生转化.Isomerization of safrole can afforded isosaf...
Daisy called her daffy, but goodhearted.黛西说她傻乎乎的，但心肠很好。"Listen," said Daisy, digging into her oatmeal.“听着，”黛西一边大口喝着燕麦粥一边说道。a daisy wheel printer菊瓣字轮打印机...
The effective date of this contract will begin from Dec . 30 th, 2007.这个合同的有效期将从2007年12月30日开始.The persons elected will sit till 31 Dec . , 1973.当选者任期至1973年12月31日.On the evening of Dec. 31, we usually celebrate the New Ye...