n. (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
pl. 细菌
[医] 细菌, [无芽胞]杆菌
1. Bacteria can be found in many different environments, including soil and water.
细菌可以在许多不同的环境中找到，包括土壤和水。
2. Some bacteria are helpful and help our bodies digest food.
有些细菌是有益的，帮助我们的身体消化食物。
3. Washing your hands can prevent the spread of harmful bacteria.
洗手可以防止有害细菌的传播。