Insecticideresistance genes are useful when there's insecticide about, but not when there isn't: then, they can be detrimental.
抗药性在有杀虫剂的地方有用，但是在没有杀虫剂的地方就没什么用了：有时甚至是有害的。
2
The An. funestus mosquito is difficult to collect and rear from the field and hence published studies of insecticideresistance in this species are limited.
在当地这种致病性蚊子很难收集和培养，所以关于这一物种耐药性的已发表的研究寥寥无几。
3
This paper reviews what is currently known about insecticideresistance mechanisms (target site and metabolic) and discusses the new pesticide research direction.