birth rate
英
[bɜːθ reɪt]
美
[bɜːrθ reɪt]
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Noun:
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the ratio of live births in an area to the population of that area; expressed per 1000 population per year
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用作名词 (n.)
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The birth rate in this city is almost constant.
这城市的出生率几乎是不变的。
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What is the most effective method of birth control?
控制出生率的最有效的方法是什么?
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