John Stevenson is Reader in History at the University of Sheffield.约翰·史蒂文森是谢菲尔德大学的历史学高级讲师。Stevenson's deeply felt performance is a tour-de-force.史蒂文森感人肺腑的表演真是绝了。We elected Mr. Stevenson to head the team.我们选举了斯蒂文森先生率...
Many microorganisms possess the ability to dehydrohalogenate DDT to DDE.许多微生物使滴滴涕脱卤化氢变为滴滴依.The house is regularly spraying with DDT.房屋是定期用DDT喷洒.The insects can be exterminated by spraying DDT.可以用喷撒滴滴涕的方法大量杀死这种昆虫.Thousand...