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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Since late July stockmarkets in America and round the world have nosedived, fearful that America is falling back into recession and that Europe’s debt crisis will drag down its banks.

自7月底起，美国乃至全球的股市一直处于狂跌状态，人们都很害怕美国会再次陷入大萧条以及担心欧洲的债务危机会拖累美国银行业。

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Since late July stock markets in America and round the world have nosedived, fearful that America is falling back into recession and that Europe's debt crisis will drag down its Banks.

自7月下旬美国股市和全球股市都遭受重创，人们担心美国经济衰退，同时也害怕欧洲的债务危机拖垮银行。

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Because fish stocks throughout the world are falling, driving up the prices of fish meal, and cotton production is rising, driving down the price of cottonseed, feeding cottonseed to catfish works for farmers of both cotton and catfish.

NPR: Texas Cotton: 'Farmer Profits at Every Step'