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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WHO supports Member States as they work to reduce the toll of COPD and coordinates international efforts to improve global respiratory health, particularly in middle- and low-income countries.

世卫组织支持会员国致力减少慢性阻塞性肺病的危害，并协调国际努力改善全球呼吸道健康，尤其是在中低收入国家。

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Globally, uncorrected refractive errors are the main cause of visual impairment; cataracts remain the leading cause of blindness in middle - and low-income countries.

在全球范围内，未经矫正的屈光不正是视力损害的主要原因，在中、低收入国家，白内障仍然是致盲的主要原因。

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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

The Lib Dems have committed themselves to using any money left over after meeting their spending priorities to cutting income taxes for those on middle and low incomes.

BBC: Clegg unveils spending priorities

Instead, Romney once again hid behind rhetoric about helping the middle classes, but if the goal is to help middle and low earners, one must positively coddle the 1%.

FORBES: Mitt Romney vs. Barack Obama: Which Candidate Is Best For the U.S. Economy?

And instead of a tax cut for millionaires, we need a lower 10p starting rate of tax to ease the squeeze on millions of people on middle and low incomes.

BBC: UK economy avoids triple-dip recession