three quarters of population

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。

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)。

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。