他在学校开通广播,以提高孩子们的警觉性。He introduced radio to the school to increase the children's awareness.与前一年相比,哥伦比亚广播公司的收视率再次大幅提高。CBS's ratings again showed huge improvement over the previous year.他呼吁企业不要过度提高价格。He appealed ...
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...