随着时间的推移，人口增加了。
从2010年到2030年，美国将通过移民使其人口增加20%。
The USA will increase, from 2010-2030, its population by 20% through immigration.
人们预期该政策将导致出生人口增加100万。
People expected the policy to result in 1 million more births.
随着全世界人口增加，许多野生动物被迫离开它们的自然家园。
As the world's population grows, a lot of wild animals are forced to leave their natural home.
他们的迁徙可能是人口增加引起的，这一人口增长是由人们逃离撒哈拉沙漠的干燥或干涸的迁移造成的。
Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara.
人口增加和气候变化都会让水危机恶化。
Population growth will make the problem worse. So will climate change.
人口增加和耕地减少的矛盾日益突出。
There is obvious conflict between population growth and agricultural land reduction.
与此同时，城市规模扩大，人口增加。
At the same time, the scale of cities was enlarged, population increased.
城市的贫困人口增加，而农村出现减少。
Urban poverty goes up and rural poverty goes down. The proportion of poor homeowners increases, while the proportion of poor renters decreases.
地球上的人口增加得很快。
随着人口增加，耕地的需求量也将增大。
And, with a rising population, more tillable land will be needed.
一是人口增加本身不是好事情，也不是怎么坏的事情。
One is that a growing population is not, of itself, necessarily a good thing, nor a falling one unambiguously bad.
人口增加导致食品短缺。
另一部分，令人惊讶的欧洲是恢复生育力和人口增加的地区。
The other, surprising Europe is a place of recovering fertility and rising population.
世界上接下来40年里人口增加的23亿中大约一半会来自非洲。
About half of the 2.3 billion increase in the world's population over the next 40 years will be in Africa.
想法固然不错，但不能解决印尼贫困人口增加问题的根源。
Admirable though it is, this policy does not tackle the root cause of Indonesia's rising poverty.
随着经济快速增长和人口增加，资源不足的矛盾越来越突出。
Along with the speedy economic growth and population increase, the lack of resources is becoming more and more serious.
但是，随着人口增加，他们不得不挤出更多的收成，而土壤不再恢复肥力。
But with more people to feed they have to squeeze in more harvests, and the soil is no longer recovering.
白人、西班牙裔，特别是亚裔的贫困人口增加，而黑人的贫困人口减少。
Poverty increases among whites, Hispanics, and especially Asians, but decreases among blacks.
如果新雇工为310万而新离职者为320万，则失业人口增加10万。
If there are 3.1 million new hires and 3.2 million new quits, then unemployment goes up by 100, 000.
但在世界总人口增加的前提下，贫困率却在过去25年中从50%下降到25%。
However, given the increase in world population, the poverty rate has still fallen from 50% to 25% over the past 25 years.
而设立更多限制条件也导致人口增加，使郊区向外扩张，而不是使郊区更密集，更趋向城市化。
Building restrictions have caused growing populations to simply expand the suburbs ever outward, rather than making suburbs denser and more city-like.
而设立更多限制条件也导致人口增加，使郊区向外扩张，而不是使郊区更密集，更趋向城市化。
Building restrictions have caused growing populations to simply expand the suburbs ever outward, rather than making suburbs denser and more city-like.
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