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...
There was a lot of unhappiness in my adolescence.年少时我经历过很多不愉快。His laugh-a-minute image is just a front to hide his deep unhappiness.他滑稽可笑的形象只是用来掩饰内心深处痛苦的假面具。He had sensed his mother's unhappiness.他感觉到了母亲的不悦。...