37 篇文章
How can this century carry the burden of nine billion human beings...
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How can this century carry the burden of nine billion human beings... 这个世纪怎么负起九十亿人的重压

Two billion people depend on them for drinking water...
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Two billion people depend on them for drinking water... 二十亿人靠喝这些河中的水生存

It affects nearly one billion people.
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It affects nearly one billion people. 影响近十亿人口

Over two billion people-
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Over two billion people- 超过二十亿人

Water shortages could affect nearly two billion people...
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Water shortages could affect nearly two billion people... 截止至2025年 水荒问题

But five billion.
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But five billion. 而是50亿辆

They produce enough grain to feed two billion people.
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They produce enough grain to feed two billion people. 他们生产的粮食可以养活20亿人

Today, over half of the world's seven billion inhabitants live in cities.
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Today, over half of the world's seven billion inhabitants live in cities. 如今 地球上70亿人口中超过一半住在城市中

And over two billion people have moved to the cities.
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And over two billion people have moved to the cities. 超过20亿人口涌入城市

Over one and a half billion human beings-
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Over one and a half billion human beings- 也就是超过15亿人类的经历