Using them, it is possible to make pure cultures of types of cells that have gone wrong in a body.

利用它们就能离体培养出与体内患病组织相同类型的细胞来。

Koch developed a technique to grow pure cultures, and through a series of experiments, definitively proved that a specific bacterium directly cause disease.

科赫开发了一种培养纯培养物的技术，并通过一系列实验，明确证明了一种特定的细菌会直接导致疾病。