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几千年来,不断增加的人口推动了人类文明进步,如果全球人口在现代历史上首次下降,会发生什么呢?历史或可为我们提供一些线索。
For thousands of years, the ever-increasing population has contributed to the progress of human civilization. What happens if the global population drops for the first time in modern history? History may give us some clues.