Control the quantity of population的意思|示意

The population control is in the sense of keeping simultaneously the quantity of population in a moderate size to enlarge the quality of population continuously.

人口控制就是把人口数量控制在一个适度的范围内，同时不断提高人口质量。

To reduce the quantity of vector mosquitoes population and its distribution are the key measures for control of malaria prevalence in high endemic areas of malaria.

高疟区控制疟疾流行的关键是降低主要传疟媒介的密度，缩小分布范围。