bacteria
/bækˈtɪriə/
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
中文释义：细菌
Some bacteria in the human gut help digest food and produce vitamins.
人体肠道中的一些细菌有助于消化食物和产生维生素。
Antibiotics are used to kill harmful bacteria that cause infections.
抗生素用于杀死引起感染的有害细菌。