birth rate
柯林斯词典
1. 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。
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birth rate (also birth-rate) (birth rates)
剑桥词典
- the number of births that happen during a period of time in a particular place
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