它是通过蚊子叮咬传播给人的，并不是在人与人之间传播。
It is spread to people through mosquito bites, not person to person.
经蚤类叮咬所致的间接传播是染疫啮齿动物与人之间最常见的传播方式。
Indirect transmission through the bite of a flea is the most common route of transmission between plague-infected rodents and humans.
他们然后还研究了这些条纹图案与29种环境变量之间的关系，包括气候、捕食和苍蝇叮咬等。
The researchers then examined the relationship between the stripe patterns and 29 environmental variables, including climate to predation to biting flies.
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