bacteria_masking:v21.8.1

Kraken2 DB for bacteria with masking option. DB built 6months after v21.1.1 with 10355 unique taxons and 59483 accession numbers面向细菌的Kraken2数据库（Kraken2 DB）支持屏蔽选项，该数据库于Kraken2 v21.1.1版本发布6个月后构建，共包含10355个独特分类单元与59483个登录号。