List of functional groups in activated sludge.

a. Genus names with single quote marks were candidate genera that could not be classified by RDP classifier. They are kept in the final database.
b. The first number indicates the sequences that could be identically classified in RDP at genus level (except for the candidate genera) and thus are kept in the final database. The second is the number of total downloaded sequences from Greengenes database. Percentage showed the portion of identically classified sequences.

a. 带单引号的属名为无法通过RDP分类器（RDP classifier）进行分类的候选属，此类属被保留在最终数据库中。
b. 第一个数值代表可在属水平上通过RDP分类器实现完全分类的序列（候选属除外），因此这类序列被保留在最终数据库中；第二个数值为从Greengenes数据库（Greengenes database）下载的总序列数；百分比则表示完全分类序列的占比。