Noun:

1. either of two different animal or plant species living in close association but not interdependent

Adjective:

1. living in a state of commensalism

COMabbr.计算机输出缩微胶片(=computer-output microfilm)abbr.组件对象模型(=Component Object Model)Comynn.科明

1. Commensal bacteria make a large contribution to the fine balance of the ecosystem.
   共生菌对维持肠道的生态系统平衡具有重要作用。