The parasites are spread to people through the bites of infected Anopheles mosquitoes, called "malaria vectors", which bite mainly between dusk and dawn.
这些寄生虫通过受感染的按蚊叮咬在人际进行传播。按蚊是疟疾病媒，主要在黄昏至拂晓期间叮咬。
Every year, nearly one million people die of malaria, which is spread by mosquitoes.
每年都有上百万的人死于蚊虫叮咬所传播的疟疾。
They were able to estimate the rate at which malaria parasites would have had to diversify in order to spread to other hosts, like mammals.
他们甚至可以推算疟疾寄生虫为了在其他宿主比如哺乳动物上传播的进化比例。
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