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9806 篇文章
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

the earth's population has almost tripled,
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the earth's population has almost tripled, 人口数量几乎增长3倍

In the last 60 years,
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In the last 60 years, 在过去的60年里

The earth has been more radically changed...
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The earth has been more radically changed... 地球被彻底改变

began the era of humans who break free of the shackles of time.
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began the era of humans who break free of the shackles of time. 挣脱时间枷锁的人类进入新纪♥元♥

freed humans from their toil on the land.
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freed humans from their toil on the land. 将人类从耕种土地上解放出来

Pure energy the energy of the sun
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Pure energy the energy of the sun 纯粹的能量 太阳能

Humankind found a way to tap into the energy buried deep in the earth.
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Humankind found a way to tap into the energy buried deep in the earth. 人类发现了取得深埋于地下的能量的方法

Half of humankind tills the soil,
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Half of humankind tills the soil, 半数的人类耕种土地

Agriculture is still the world's most widespread occupation.
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Agriculture is still the world's most widespread occupation. 农业仍是世界上最普遍的职业