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汉语拼音：chū shēng lǜ

一定时期内（通常是一年）出生人数在总人口中所占的比率，通常用千分率来表示。

1. 每年出生婴儿数在总人口中所占的比率，通常以千分之几来表示。

• Poverty and illiteracy go together with high birth rates.

  贫困、文盲与高出生率密切相关。

• Maternity services were to be reduced in consequence of falling birth rates.

  由于出生率下降，产科服务会随之削减。

• Several factors have been adduced to explain the fall in the birth rate.

  有几个因素已被援引来说明出生率降低的原因。

• The birthrate is on the decrease.

  人口出生率正在下降.

• The birthrate is on the decline.

  出生率在下降.

• Birth rates are notoriously difficult to predict.

  众所周知,出生率是很难预测的.

• The birthrate in the city has been decreasing.

  该市的出生率一直持续下降.

• Reduction of competition for food stimulates both natality and survival.

  食物竞争的减少,刺激了出生率和存活力.

• The birth rate in this city is almost constant.

  这城市的出生率几乎是不变的.

• The birth rate in our country has been declining for several years.

  我国人口的出生率几年来一直在下降.

• The birthrate in France has been declining for several years.

  近几年来,法国的出生率一直在下降.

• The graph shows a bulge in the birth rate.

  图表显示出生率的暴增.

• After the war there was a bulge in the birth - rate.

  战后出生率激增.

• The child birthrate in that area has doubled.

  该地区的婴儿出生率已经增加了一倍.

• The proportion of the population was going down in the past few years.

  在过去的几年里人口出生率在下降.