In the studied communities in the world, close to half the population is moving up or down the socioeconomic ladder, often with the same people rising and then falling at different times.

在世界上经研究的社区中，几乎有一半的人口正在社会经济的阶梯上向上或向下移动，往往是同样的人在不同的时间内上行而后又下跌。

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Half century ago, only about one third of the world population belongs to cities, but in the year 2005, it will comes to more than estimated one half.

半个世纪以前，城市居民只约占世界人口的三分之一，但到2005年，城市居民预计达到一半以上。

youdao

He says it is increasingly important to do this analysis in connection with urbanization because more than half of the world population lives in urban areas.

VOA: standard.2009.03.23

For the first time in history, Latin America and Africa provide more than half of the population of Catholics in the world today.

CNN: Why the next pope should be African

Approximately one-half of the world's population lives in rural areas, according to the World Health Organization, and most of them usually lack trained health care workers.

CNN: Bringing health care to the world's most remote areas

More than half the world's population already lives in cities and the urban population of sub-Saharan Africa is projected to double by 2030.

BBC: Africa: Feeding the rising urban population