translation.en: And the what, I think, is that we returned, over and over again, to the Pre-Cambrian world, that first microbial age, and the microbes are still out there.
translation.zh: 我认为，我们会一次又一次地 重回前寒武纪时期，也就是第一个微生物时代， 而微生物也还仍然存在。