harmful micro-organisms 有害微生物
beneficial micro-organisms 有益微生物
micro-organisms in soil 土壤微生物
pathogenic micro-organisms 病原微生物
micro-organisms growth 微生物生长
study micro-organisms 研究微生物
micro-organisms culture 微生物培养
A: What are micro-organisms?
A：什么是微生物？
B: They are tiny living things we cannot see without a microscope.
B：它们是肉眼看不见的微小生物。
1) 肉眼不可见的微小生物统称
2) 包括细菌、病毒、真菌等
3) 广泛存在于自然环境中
1. 微生物（肉眼不可见的微小生物）
2. 显微生物
noun
1. Extremely small living organisms, such as bacteria, viruses, fungi, and protozoa, that can only be seen with a microscope.
Synonym: microbes, microorganisms