All of those slave societies had a population of slaves that was from one-quarter to one-half, and sometimes more, of the total population.

这些奴隶社会的奴隶人口都占总人口,的三分之一到一半,有时甚至更多

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For starters, America's much more bigger in terms of population

美国拥有更多的新居人口

多民族城市，伦敦 - SpeakingMax英语口语达人