Aerobic nitrogen- fixing bacteria的用法和样例：
- aerobic nitrogen fixing bacterium
- Any of various rod - shaped,nonpathogenic,nitrogen - fixing bacteria of the genus Azotobacter,found in soil and water.
- There was a negative correlation between the nitrogenase activities of nitrogen fixing bacteria in root and that in leaf and stem.
- Any of various rod - shaped, spore - forming, chiefly anaerobic bacteria of the genus Clostridium, such as the nitrogen - fixing bacteria found in soil and those causing botulism and tetanus.