1. 人口出生率,生育率：dewatering screen 沥水筛 | fertility rate 人口出生率,生育率 | critical position 临界位(置)

2. 受精率：fertility evaluation 土壤肥力评价 | fertility rate 受精率 | fertilization 受精

noun

1. the ratio of live births in an area to the population of that area
expressed per 1000 population per year

Synonym: birthratebirth ratefertilitynatality