But both the parasite that causes malaria, and the mosquitoes that transmit it, can survive over large swathes of the planet, and until recently, malaria regularly killed people all over the world.
但是无论是导致疟疾的寄生虫,还是传播疟疾的蚊子,都可以在地球上的很多地区生存,到近些年来,疟疾呈规律性地杀死世界各地的人民。