【医】 Nitrobacteriaceae
【化】 nitrifier; nitrifying bacteria
【医】 Bacillus nitrificans; nitrifier; nitrifying bacteria
nitrifying organisms; nitrobacteria; nitrobacterium
a branch of academic study; family; pass a sentence; section
【化】 family
【医】 department; family; family systematic
【经】 accountant's department; division head; section