我们还在这些遗址中发现了马骨，这些马骨可以追溯到博泰人定居的时期。
We also found horse bones at these sites and these can be traced back to the time of the Botai settlements.
公元前8200年的时候，旱情十分严重，这使得人们放弃了居住已久的定居点，并可能散居到更小的营地中去了。
By 8,200 B.C., drought conditions were so severe that the people abandoned their long-established settlement, perhaps dispersing into smaller camps.
一个原始物种可能已经适应了利用一个岛屿上特定的生态位，然后在水上迁徙到其他岛屿定居。
An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands.
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