fertility ratio信息详情
生育率
fertility treatments───不孕治疗；施肥处理
fertility goddess───丰产女神
fertility treatment───生育治疗
ratio───n.比率，比例
variation ratio───异众比率；变异比率；变速比，变速范围
soil fertility───土壤肥力[肥度]; 地力；[土壤]土壤肥力；地力
fertility definition───生育率定义
fertility diet───生育饮食
fecundity fertility───生殖力
When fertility is high and a country is young (median age below 20), there are huge numbers of children and the overall dependency ratio is high. ───一个国家生育率高，表示这个国家很年轻（中位年龄在20岁以下），小孩数量庞大，依赖性比例相当高；
Even in cultures without access to mass media, the optimum waist-to-hip ratio for women is around 0.7, which corresponds most closely to an hourglass shape, and is linked to fertility.───即使在和大众传媒没有交集的文化中，女性腰围与臀围的最佳比例也是在0.7左右，近似于沙漏形状，并与生育有关。
Scientists concluded that such a small ratio was considered good for a woman's health and resulted in high fertility.───科学家总结认为这样的比例对女性健康和生育有利。