A biofilm is basically a layer of " slime" made of exopolysaccharides or EPS, within which Staph saprophyticus live and reproduce.

这种生物膜通常是一层由胞外多糖（EPS）形成的“粘液”，腐生葡萄球菌在其中生存和繁殖。

The oral microbiota is found in saliva, the surface of gum tissue and teeth, and in biofilms which are basically layers of goop-like material made of exopolysaccharides or EPS within which bacteria survive in a quiescent or slow-growing state.

口腔微生物群存在于唾液、牙龈组织和牙齿表面及生物膜中；生物膜是种主要由胞外多糖（EPS）组成的黏液状物质；细菌在其中处于静止或者缓慢增长状态。