Demographers say that in the future China will have 30 million more men than women.

人口统计学家称，未来中国的男性会比女性多三千万。

The old man used to be a famous demographer.

这位老爷爷以前是一名著名的人口学家。

The child is working hard to become a demographer.

这个孩子在为了成为一名人口统计学家而努力着。

"Now, foreigners come to Hong Kong to build a life, " says Paul Yip, a demographer at the University of Hong Kong.

“现在，外国人来香港建立他们的生活。”香港大学的人口统计学家 Paul Yip 说。

The demographer will coordinate data collection and analysis on human settlements conditions.

这个人口统计学家将会整合这些数据并分析人类的居住条件。

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。

One demographer has said the300 millionth person would likely be a Latino boy given current U. S. population trends.

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。

Joel Kotkin, a demographer, points out that California has always had fires during dry years, at least since the time of the Spaniards.

人口统计学家约尔·柯特金指出，加州在干旱年份总是有火灾，这至少始于西班牙人统治时期。