the number of births every year for every 1 000 people in the population of a place 出生率（某地区每年每 1 000 人中的出生数目） a low/high birth rate 低／高出生率 The birth rate is falling/rising. 出生率正在下降/上升。 Educating girls has the effect of lowering birth rates. 让女孩接受教育可以起到降低出生率的作用。