Microbial ecology is a science designed to study the interaction between microbes and the environment which is consisted of two parts--biosurrounding and non-bio surrounding Microflora or normal flora(微生物区系或正常菌 群)Microbial ecology is a science designed to study the interaction between and the environment which is consisted of two parts——biosurrounding and non-bio surrounding . microbes Microflora or normal flora（微生物区系或正常菌 群）