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...
We just sat and talked for half an hour or so.我们只是坐了一会,聊了大约半小时.After half an hour's commis-eration, we turned to more practical matters.惺惺相惜了半个小时后，我们转而讨论一些更为实际的问题。In half an hour, they'd switched the tags on ev...