The different environmental groups could work together to their mutual benefit.不同的环保组织可以携手合作,互惠互利。There is a symbiosis between monarch and church.君主和教会之间有一种互惠互利关系。They have a relationship that is beneficial to/for both of them.他们保持着一种互惠互利的关系。There is a symbiosis between celebrities and the media.名人和媒体间是一种互惠互利的关系。