而地面上检出的细菌种类最多，正像作者所称是“形形色色的细菌群落”，包括几种通常存在于土壤中的细菌。
The floor had the biggest bacteria party, revealing what the authors called "diverse bacterial communities" of organisms, including several typically found in soil.
细菌、真菌、霉菌、放线菌等使土壤形成许多小孔隙。土壤里的这类生物总称为“微生物群落”。
Bacteria, fungi, molds, and actinomycetes, which leave tiny openings in the soil. In soil, all organisms of this type are called microflora.
目前国内针对氨氧化细菌的研究多集中在活性污泥和污水处理器等方面，鲜少涉及其在土壤特别是酸性土壤中的群落结构分析。
Hitherto, domestic researches on AOB are mainly about active sludge, sewage processor and so on, while investigations of AOB community structure in soils especially acidic soils are seldom reported.
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