1. In a year, the average breeding density of Acaroid mites was 3.
淮南地区一年之中粉螨的平均孳生密度为3。

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2. In a year, the average breeding density of Acaroid mites was 3.
淮南地区一年之中粉螨的平均孳生密度为3。

来自互联网