By 2025, it is likely that three quarters of the world's population will live within 100 kilometers of the sea, placing huge strains on coastal ecosystems.

到2025年，世界人口可能会有四方之三生活在距海洋100公里之内的地方，对海洋生态系统带来巨大的压力。

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The interior has demographic depth: Anhui alone has a population of 62m, about three-quarters of Vietnam's (although about a fifth of its Labour force already works outside its borders).

内地有更加丰富的人力资源可资利用：仅安徽一省就有人口6千2百万，大约越南人口的四分之三(尽管该省越五分之一的人口已经在外地打工)。

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The problem could worsen if, as projected, three-quarters of the world's population is living in cities by 2013.

如果像预测的那样到2013年世界人口将有四分之三居住在城市的话，这个问题将进一步恶化。

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I'm told that support for setting the cap for benefits for families at two children is around three quarters of the population.

BBC: The politics of welfare cuts

Opening the debate on 26 March 2012, Mr Vaizey said three quarters of the population of England, Wales and Northern Ireland have access to high-speed broadband.

BBC: Minister: UK is 'top internet economy'

Protesters have taken to the streets, complaining that although three quarters of the population have rejected genetically-modified food, the government consistently supports genetic engineering, supports the biotech companies and doesn't take action on their behalf.

BBC: News | The Economy | Genetically modified decisions