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1. The microbiologist found the bacteria in the soil and identified them as E. coli.
微生物学家在土壤中发现了细菌，并鉴定为大肠杆菌。
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2. The study of microbiology is crucial for understanding the functioning of ecosystems.
微生物学的研究对于理解生态系统的功能至关重要。
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3. Microbiologists use various techniques to study the interactions between different species of bacteria.
微生物学家使用各种技术来研究不同种类的细菌之间的相互作用。