It noted the United States has the largest prison system in the world, with the highest inmates-to-populationratio.
他提醒美国拥有世界上最大的监狱系统和最高的犯罪率。
2
As that report noted, the physician-to-populationratio 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。
3
Living in today's society, the populationratio of female and male gradually becomes unbalanced. Along with this fact, the number of female who study and participate in art also increased.