the relation between two different kinds of organisms when one receives benefits from the other without damaging it
commensalism详细解释
com.men.sal.ism n.Biology （名词）【生物学】 A symbiotic relationship between two organisms of different species in which one derives some benefit while the other is unaffected.共生，共栖：不同种类两个组织之间的共生关系，在此关系中一个受益而另一个不受影响
