Around 9 in 10 people in low-and middle-income countries live in places where they regularly experience dangerous levels of outdoor air pollution.

在低收入及中等收入国家，大约十分之九的人生活在室外空气污染经常达到危险程度的地方。

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Beyond that, he would create or expand a variety of tax credits for low - and middle-income workers.

除此之外，他还建议设立或扩大对低、中产阶级的一系列课税扣除。

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The data were analysed and compared with data derived from studies in other low - and middle-income countries.

对数据进行分析并与来自其他中低收入国家研究得出的数据进行比较。

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A new study says the leading cause of disability in older people in low and middle income countries is dementia.

VOA: special.2009.12.28

The study says the elderly are nine percent of the total population of low and middle income countries today.

VOA: special.2009.12.28

In low and middle income countries, heart disease and cancer get much of the attention given to chronic diseases.

VOA: special.2009.12.28

During Prime Minister's Questions, she told David Cameron that the coalition's plans would hit low and middle income families.

BBC: Northern Ireland MPs express benefits concern

Many expenses tend to hit low and middle income Americans the hardest.

FORBES: Magazine Article

He argued that it was not fair to axe the higher tax threshold of "low and middle income pensioners" - the so-called "granny tax".

BBC: MPs vote to approve Budget