人口统计学家

Demographer Richard Lee of the Universiy of California at Berkley says this aging of the world has a significant impact on economies.

来自 Berkley 加利福尼亚大学的人口统计学家 Richard Lee 说，世界人口老龄化对经济产生深远影响。

One demographer has said the 300 millionth person would likely be a Latino boy given current U.S. population trends.

美国一位人口统计学家曾说，从目前美国的人口走势来看，这第三亿个人可能会是一个拉丁裔男婴。

There are lots of people who are using food stamps for the first time, because they don't have any other options,' said Mark Mather, a demographer at the Population Reference Bureau, a nonprofit research group in Washington.

华盛顿非盈利研究机构人口咨询局的人口统计学家马瑟表示，很多人都是第一次领取食品券，因为他们没有其他选择。

Carl Haub is a demographer with the P.R.B."The population data sheet is an annual demographic survey, in which we gather demographic population statistics from all countries over the world."

Carl Haub 是人口参考局的一位人口统计学家，他说：人口数据表就是一项年度人口调查，在这项调查中我们搜集了世界上所有国家的人口统计表。

Carl Haub is a demographer with the P.R.B.

卡尔*霍伯是美国人口咨询局的人口统计学家。

The real cause, argues Nick Eberstadt, a demographer at the American Enterprise Institute, a think-tank in Washington, DC, is not any country's particular policy but "the fateful collision between overweening son preference, the use of rapidly spreading prenatal sex-determination technology and declining fertility."

真正的原因，尼克艾伯斯塔德，一名美国企业研究所的人口统计学家，华盛顿特区智能团专家说，不仅仅是因为任何国家的人口政策，而是"严重的对男孩的偏爱，以及广泛运用的出生前婴儿性别检测和选择性生育"。

Demographers in China will celebrate 2010 as a golden year: the moment when the "demographic dividend" of the past couple of decades will reach its peak.

中国的人口统计学家预备庆祝2010年这一黄金时期：在那时，持续了二十年的"人口红利"将达到顶峰。

Moreover,demographers see the continuing shift south and west as joined by a related but newer phenomenon:More and more,Americans apparently are looking not just for places with more jobs but with fewer people,too.

而且，人口统计学家发现，向南部和向西部的不断迁移还伴随着一种与之相关却又较新的现像：越来越多的美国人显然不再仅仅寻找有更多工作机会的地方，也在寻找人口稀少的地方。

Moreover, demographers see the continuing shift south and west as joined by a related but newer phenomenon: More and more, Americans apparently are looking not just for places with more jobs but with fewer people, too.

在人口不断向南和向西迁移的同时，人口统计学家也发现了一个新的现象，那就是：越来越多的美国人不光在寻找有更多工作机会的地方，而且也在寻找人口稀少的地方，下面几个例子可以证明。

In May 2008 demographers in the United States announced that the estimated global urban population had exceeded the estimated global rural population for the first time.

2008年5月在美国人口统计学家宣布，估计全球城市人口超过了预计的全球首次农村人口。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。