1. 共生(关系)
    Symbiosis is a close relationship between two organisms of different kinds which benefits both organisms.

2. 互惠互利的关系;共赢关系
    Symbiosis is any relationship between different things, people, or groups that benefits all the things or people concerned.

1. the relation between two different species of organisms that are interdependent
    each gains benefits from the other

    Synonym: mutualism