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。
In the U.S., mosquitoes were responsible for the West Nile outbreak, and half the world's population is at risk for malaria, which is spread via pathogens in the mosquito's saliva.
数年前美国的西尼·罗热的罪魁祸首就是蚊子，世界上一半的人口面临疟疾的威胁，蚊子唾液中的病原体就是其传播渠道。
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。
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