Scientists explain that for these women's mitochondrial DNA to be passed to on to generations living today, the seven not only had to survive to adulthood, but each had to give birth to at least two daughters.
科學家解釋，這幾位遠古女性不僅要活到成年，而且每個人至少要生下 2 個女兒，她的粒腺體 DNA 的遺傳鍊才能延續到今天。