The problem of population and economy is one of the long term problems noticed by human society and is the most important research contents of populationeconomics.
人口与经济问题是人类社会长期关注的问题之一，也是人口经济学最重要的研究内容。
2
People are fleeing the cold: there is a strong correlation between the average temperature in January and population growth, notes Edward Glaeser, a professor of economics at Harvard University.
哈佛大学经济学教授爱德华格雷泽指出，人们趋暖避寒：1月均温与人口增长有着密切的相互关系。
3
This passage introduces of population pressure - the greatest feature of modern malthusian theory, of economics of population.