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.
Philpott tamped a wad of tobacco into his pipe.菲尔波特往烟斗里塞了一卷碎烟叶。Use this wad of cloth to plug the barrel.用这软布把桶塞上.Wad the space with paper, please.请用报纸填塞空隙....
He was caught out while lapping a slower rider.他在套圈超越一位落后的车手时出了错。His heart rate was 30 beats per minute slower.他的心率每分钟慢了30次。It works only in the veins, where the blood flow is slower.它只在静脉里起作用，在静脉中血液流动更慢一些。...