noun 下载 🔗分享 出生率,生育率 The ratio of total live births to total population for a specific community or nation in a specified period; often expressed in births per thousand per year Examples : "The birthrate in the city has been declining steadily for the past five years. " 过去五年,这个城市的出生率一直在稳定下降。 statistics society number family 与AI对话词汇游戏阅读练习