Even so, the surviving records of North America do contain references to deadly epidemics among the indigenous population.
尽管如此,现存的北美记录确实提到了土著居民中发生的致命流行病。
First, we examined consumption function model which doesn't contain the age structure of population variables and we conduct a brief analysis.
首先,我们检验了不含人口年龄结构变量的消费函数模型,并对结果进行了简要的分析。
Last year, the team lowered the mosquito population by 90 percent during a trial using the same method and helped to contain a local outbreak of dengue fever.
去年,为了帮助控制局部暴发的登革热,该团队使用同样的方法在一个试点区域内将蚊子数量降低了90%。
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