America's Census Bureau simply assumes that current fertility rates will persist.
美国人口普查局作出简单假设，目前的生育率将持续一段时间。
The target reductions in fertility rates were reached long ago. Current rates, he says, are below replacement levels and are unsustainable.
他说，生育率的下降目标早已实现，现在的生育率已经低于人口替换率，这会导致失衡。
Stabilization of the world population at 8 billion or below by 2050, through a voluntary reduction of fertility rates, rather than the current trajectory of more than 9 billion by midcentury
2050年将世界人口稳定在80亿或80亿以下。通过自发主动减少出生率，将改变人口以现在的增长速度在本世纪中叶突破90亿的推测。
Rapid speed of aging results from low fertility; material preparation should be made ahead of time by taking advantage of current preferable population conditions.
老龄化速度快是低生育的结果，应充分利用“人口红利”为老龄化做好物质准备。
This article discusses the concept of the low fertility and calculates the value of the current replacement-level fertility in China.
本文讨论了低生育水平的内涵，计算了目前中国更替水平的数值。
The principle, characteristics and its current application in classification, fertility, pollution and corrosion of soil environmental quality assessment in recent years are reviewed in the paper.
文章对其原理、特点及其近年来国内在土壤分类和土壤肥力、污染、腐蚀等质量评价中的应用及进展进行了评述。
According to the psychologists at the University of Texas at Austin who conducted the study, a woman's body generally provides information about her current state of fertility.
据实施此项研究的奥斯汀德克萨斯大学的心理学家们所说，女人的身体通常会提供一些信息来表明其当前的生育状况。
According to the psychologists at the University of Texas at Austin who conducted the study, a woman's body generally provides information about her current state of fertility.
据实施此项研究的奥斯汀德克萨斯大学的心理学家们所说，女人的身体通常会提供一些信息来表明其当前的生育状况。
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