溴化反应较不易发生.Bromination takes place less readily.溴化烷可以这样形成.Alkyl bromides can be produced this way.溴化氢加成的最后一步,是负离子亲核试剂的附加.The addition of hydrogen bromide involves the attachment of an anionic nucleophile in the final step...
The cook is in charge of the kitchen helper.这位厨师负责管理厨工.The plumber's helper passes him tools.水暖工的助手把工具递给他.His research reveals a " helper's high. "他的研究揭示了 “ 给予者的快乐 ” 这种说法....
丹透过烟雾和咖啡的热气朝他笑了笑。Dan smiled at him through a haze of smoke and steaming coffee.他们在烟雾中迷失了方向，向里面胡乱射击了一通。They were disorientated by the smoke and were firing blindly into it.几分钟不到，大厅里就弥漫着呛人的烟雾了。Within minutes the hall was f...