population quality的用法和樣例：
例句
- Providing good education is important for improving population caliber.
優教是提高人口素質的重要措施。 - We should improve prenatal and postnatal care and foster physical fitness among the population.
我們要加強優生優育工作，通過人口素質。 - We should continue to control population growth and improve the quality of the population.
要堅持控制人口增長，提高人口質量。
