It noted the United States has the largest prison system in the world, with the highest inmates-to-population ratio.

他提醒美国拥有世界上最大的监狱系统和最高的犯罪率。

youdao

As that report noted, the physician-to-population ratio is lowest in sub-Saharan Africa, where the disease burden is greatest.

该报告指出，在疾病负担最重的撒哈拉以南非洲，医生占人口的比例最低。

youdao

It is thanks to an ageing population and soaring health and pension costs that America's debt ratio will still be rising in a decade.

在美国，归因于其老化的人口以及飙升的健保及退休金成本，债务比率在未来十年仍将继续攀高。

youdao

The ratio of nurses to population is about ten times higher in the United States and countries in the European Union.

VOA: special.2010.06.07

All tended to have a high slave-to-free ratio of population.

人口中奴隶所占的比例 都是非常高的

耶鲁公开课 - 美国内战与重建课程节选

While the unemployment rate remains steady at 9.5%, the employment-population ratio continues to fall each month.

FORBES: Magazine Article

The employment-population ratio, at 58.5% , changed little, the Bureau of Labor Statistics said today.

FORBES: White House Advisor Krueger Says Demographics To Blame For Weak Job Numbers

However, from an employment-population ratio perspective, this downturn began in April 1990 and lasted 31 months.

FORBES: Endless Recessions, Jobless Recoveries