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1·I see demography as a central subject related to economics.

我认为人口统计学是与经济学相关的核心学科。

2·Why should you consider taking a course in demography in college?

为什么你应该考虑在大学里修一门人口学的课程呢？

3·Demography gives you the tools to understand and to address these problems.

人口统计学为你提供了理解和解决这些问题的工具。

4·Models from economics and demography become the definitive tools for examining the financial base of social security.

来自经济学和人口学的模型成为检验社会保障财政基础的最权威工具。

5·Demography also includes the study of non-living objects like light bulbs and taxi cabs and buildings because these are also populations.

人口统计学还包括对非生物物体的研究，如灯泡、出租车和建筑物，因为这些也属于种群。

6·Demography is not destiny.

人口情况并非命运。

7·The other is demography.

其二是人口统计学。

8·Demography is a start.

人口只是一个开始。

9·SOME blame demography, others the recession.

有人责怪人口统计，有人归咎于经济衰退。

10·The main character is a man, the focal subject demography.

故事的主人公是一个男人，人口调查是聚焦的重点。