In the wild, they are a co-operative, group-living species.
在野外，它们是合作的群居物种。
2
As the previous article suggests, that could be particularly important in a collaborative, group-living species such as humanity.
正如上篇所说那样，MHC在人类这样需要合作与群居生活的生物中就显得尤为重要。
3
In the wild, they are a co-operative, group-living species. Such co-operation is likely to be stable only when each animal feels it is not being cheated.