经过几代人的人口增长，人们以如此高的密度挤满了这个地区，以至于公共聚居地的出现可能是一个必要的结果。
After several generations of population growth, people packed the landscape in densities so high that communal pueblos may have been a necessary outcome.
“而且经过几代之后，就会形成一个新物种了，”他说。
And after several generations, you'd have a new species, "he said."
经过几代人的努力拼搏，2008年，我们的梦想终于实现了！
Through the efforts of several generations of hard work, in 2008, our dream is finally here!
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