birthrate
n. 出生率
近义词：natality，fertilityrate，fertility，birthrate，
英英释义
Noun
- the ratio of live births in an area to the population of that area; expressed per 1000 population per year
例句
用作名词(n.)
- The birthrate is on the decrease.人口出生率正在下降。
- The birthrate in this city is increasing at a ratio of 0.6 to a thousand every year.这个城市的出生率以每年千分之0.