他们攻击的所有阶段的螨的生命周期。
淮南地区一年之中粉螨的平均孳生密度为3。
In a year, the average breeding density of Acaroid mites was 3.
科学家们建立了一个计算机模型去追踪如何才能减少家里床上屋尘螨的数量。
The scientists developed a computer model to track how changes in the home can reduce Numbers of dust mites in beds.
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