1.
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。
2.
The birthrate is on the decrease.
人口出生率正在下降。
3.
The birth rate have fall to twelve per hundred.
出生率下降到12％。
4.
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。
5.
The birth rate dropped in the 1980's.
人口出生率在20世纪80年代下降了。
6.
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。
7.
The war brought about a reduction in the birth-rate.
战争导致出生率下降.
8.
The birthrate in the city has been decreasing.
该市的出生率一直持续下降。
9.
There was a significant fall in the prevalence of CP among VLBW babies over the study period.
在研究的时间段内，极低出生体重婴儿的脑瘫发病率显著下降。
10.
In the decade of the 1980s the decline in world fertility will continue noticeably.
在本世纪80年代的10年中，世界人口出生率将继续大大下降。
11.
In the case of population growth this momentum can persist for decades after birthrates drop.
人口增长的这种势头在出生率下降后还可以持续四年。
12.
"When the birth-rate increases and the death rate drops, the population increases."
当出生率上升,死亡率下降时,人口就会增加。
13.
After education, the percentage of the people who married early and had children early dropped to below 1 percent and the birth defect rate, to below 8 per thousand in 1991.
实施教育后的1991年，早婚早育降到1%以下，出生缺陷率降到8‰以下。
14.
There has been a small but consistent decline, of about one per 1,000 births annually, in the proportion of boys being born in industrialized countries over the past 40 years.
在过去40年中，发达国家的男孩出生率一直以每年约千分之一的比率小幅下降。
15.
Although the throwing of rice continues at most weddings the birthrate is declining in the United States.
虽然撒生米在大多数婚礼上仍在采用，但是美国的出生率在不断下降。
16.
The birthrate dropped from 21.06 per 1,000 in 1990 to 17.7 per 1,000 in 1994.
中国人口出生率1990年为21.06‰，1994年下降为17.7‰；
17.
However, thanks to a falling birth rate, school rolls continue to fall.
不过，由于出生率的下降，注册学校不断减少。
18.
population explosion( sudden increase in populationresulting from an increased birth-rate and/or a reduced death-rate)
人口爆炸（由于出生率上升和[或]死亡率下降而引起的人口急剧增加）.