This was really an important revolution in human history, because it allowed us to continue to evolve in equatorial environments.
这在人类历史上确实是一场重要的革命，因为它允许我们继续在赤道环境中进化。
This was really an important revolution in human history, because it allowed us to continue to evolve in equatorial environments.
这在人类历史上确实是一场重要的革命，因为它允许我们继续在赤道环境中进化。
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