To do that required tests within a connected community, "endogenous groups" - those with fewer links outside the group.
这需要在一个互接连的社区内进行测试，“内生的组织”——在组织之外的连接很少。
The human genome has accumulated over millions of years of evolution a lot of viral fragments called endogenous retroviral sequences.
经过几百万年长时间的进化，人体能够制造出许多被称为内生逆转录序列的病毒HERV。
But there could be a cleverer way: to awaken our bodies' own "endogenous" stem cells to achieve natural regeneration.
但是可能有更聪明的做法：唤醒身体自身的内源性干细胞来实现自然的重生。
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