The study of population-economy system should start with the population system, and at the same time, every sub-system should be analysed and synthesized.

研究人口——经济系统，首先从人口系统着手，并分别对各子系统进行分析和综合。

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Against a backdrop of drastic changes in economy and population structure, younger Americans are drawing a new 21st-century road map to success, a latest poll has found.

一项最新民调发现，在经济和人口结构发生巨变的背景下，美国的年轻一代正在绘制一幅21世纪通向成功的地图。

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We know China is a country with a large population and will be the leader of the economy around the world in the future.

我们知道中国是一个人口大国，未来将成为世界经济的领导者。

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As the American economy grew,however, businessmen saw China -- with a population of four hundred million people -- as a great market for American products.

VOA: special.2010.07.29

For all its near-billion population, its should-be booming economy and its admirably efficient army, India always seems to be held back by something its fragile sense of national identity, the geographical isolation of the Indian subcontinent between mountains and sea, maybe the inward-looking nature of the Hindu religion from becoming the sort of country that strides confidently on to the world stage.

ECONOMIST: THE NEXT BALANCE OF POWER

Together, the BRICS nations make up more than 40% of the world population and one-fifth of the global economy.

CNN: BRICS leaders edge closer to setting up development bank

Indonesia, with the world's fourth-largest population, enjoys a stable political environment with solid growth and a well-diversified economy.

WSJ: Ian Bremmer on Pivot States