Humanity was once caught in the trap of high fertility and high mortality.

人类过去掉入高出生率和高死亡率的陷阱，而现在逃到了低出生率和低死亡率的自由之地。

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It's Africa, because there are many countries that have very high fertility.

在非洲是因为在那里的很多国家出生率依旧很高。

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Men consistently want women who show signs of youth and femininity, which in turn indicate high fertility.

男人总希望女人年轻和阴柔，这反过来表明了高生育率。

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Studies showed that during periods of high fertility, women are more drawn to more rugged, dominant-looking men.

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Much of this population growth is expected to come from high fertility countries, 39 of which are in Africa.

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Humanity was once caught in the trap of high fertility and high mortality.

ECONOMIST: Declining populations