birth rate
英[bɜːθreɪt]
美[bɜːrθreɪt]
- birth n.分娩;出生;诞生;血统v.分娩;产生adj.有血亲关系的
- rate n.比率;速度;价格;费用;等级v.认为;估价;定等级;值得;怒斥;责骂
Noun:
-
the ratio of live births in an area to the population of that area; expressed per 1000 population per year
用作名词 (n.)
- The birth rate in this city is almost constant.
这城市的出生率几乎是不变的。
- What is the most effective method of birth control?
控制出生率的最有效的方法是什么?