completed birth rates [统计] 完全出生率
Lower birth rates 降低出生率
Low Birth Rates 低人口出生率
Crude Birth Rates 粗出生率
lowering birth rates 降低出生率
birth rates of twins 双生子出生率
As Birth Rates Decline 因为生育率下降
international variations in birth rates [统计] 国际间出生率差异
·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N-COUNT The birth rate in a place is the number of babies born there for every 1000 people during a particular period of time. 出生率
America's birth rate fell to a record low last year.
美国去年的出生率降到了创纪录的最低点。
Maternity services were to be reduced as a consequence of falling birth rates.
孕产服务因下降的出生率而将被削减。
Lower birth rates, low juvenile survivorship, and low growth rates follow, so there is a corresponding decline in hare abundance.
随之而来的是较低的出生率、较低的幼兽存活率，以及较慢的生长速度，使得野兔数量相应减少。
Perhaps birth rates will bounce back.
或许出生率会反弹。
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