谁能否帮忙翻译一段话，论文上用

Natural microorganisms, almost all mixed together. If people observe, study and use of a particular microbe, it must be from a variety of mixed microbial environment carved out. Flat crossed microbiological method commonly used to the separation and purification. Microbial cultures or samples containing microorganisms medium transplant operation called inoculation, microbial inoculation of scientific research and experiment of a basic technique, gradients mainly for inoculation against pure bacteria, proliferation after it for the identification and preservation of species. Microbial culture is an important operation microbial technology, because oxygen for the yeast's life plays an important role, So this experiment aerobic cultivation its training. Microbiological experiments to establish the concept of aseptic operation, the master basic aseptic operation of the link.