n.出生率
birthroot midwifery───生根助产
reflections on my eightieth birthday───关于我八十岁生日的思考
birth order does it matter───出生顺序有关系吗
wife birthday wishes───妻子生日祝福
birther theory───出生理论
fowled up birthday───匆匆忙忙过生日
birth certificates───出生证明（birthcertificate的名词复数）；n.出生证明( birth certificate的名词复数 )
birthroot midwives and birth center───出生地助产士和生育中心
belated birthday images───迟来的生日图片
births per day us───美国每日出生人数
Asan's birthrate is 1.08, much lower even than the low national average, according to Ko Bun-Ja, one of deputies helping organize the event.───据协助组织这次活动的代表 Ko Bun-Ja，牙山市的生育率是1.08，甚至远远低于全国平均水平。
a birthrate of 1.38 children per woman.───一个数据可以证明这种现象：出生率是平均每名女性有1.38个孩子。
new birthrate has decreased from last year's.───新出生率与去年相比有所下降。
If the Palestinians got the right to vote, given their higher birthrate, within a few decades Israel would no longer be a Jewish state.───如果巴勒斯坦人获得了选举权，考虑到他们较高的出生率，在几十年内以色列将不再是一个犹太国家了。
The argument that this will result in a lower birthrate is laughable, people will have kids regardless of being married.───认为这样会导致低出生率的观点是十分可笑的，人们就算不结婚也可以生孩子的啊。
So even if the birthrate should rise somewhat, little expansion is possible for elementary and secondary school enrollments.───因此，即使出生率有所上升，中小学入学人数不可能有大的增长。
An effective improvement cannot be only obtained by improving the birthrate through the subsidy (Pass) in which money is improved.───提高出生率，仅通过提高金钱的补贴是无法得到有效改善的！
Emigration and a high mortality rate among middle-aged men are part of the cause. But so is a low birthrate.───移民和高死亡率是其中的一个原因，还有低出生率。
Officials say the nation's low birthrate is partly due to more women joining the workforce and the lack of a comprehensive welfare system.───政府官员称，造成韩国低生育率的一部分原因是因为越来越多的女性进入职场，而且福利制度也不够完善。