NN们来看下这句话要怎么翻译？

Until recently, scientists did not know of a close vertebrate analogue to the extreme form of altruism observed in eusocial insects like ants and bees, whereby individuals cooperate, sometimes even sacrificing their own opportunities to survive and reproduce, for the good of others. However, such a vertebrate society may exist among underground colonies of the highly social rodent Heterocephalus glaber, the naked mole rot.

OG里面第一篇的第一段话。。。。叹一个。。直接导致我第六题做错。。。。。。。NN们进来看看吧。。。。