For example, the problem of population, resources, environment, and so on.
如人口问题、资源问题、环境问题，等等。
The most important world problem is the rapidly increase of population.
世界上最为重要的问题是人口的迅速增长。
The use of various energy sources is the final problem stemming from human population growth.
源于人口增长的最终问题是如何使用不同的能源资源。
Injury is an important public health problem which threatens the health of elderly population.
伤害是危害老年人群健康的一个重大的公共卫生问题。
First of all, people began to realize the population problem.
首先，人们开始认识到了人口问题。
What is more important is to resolve the problem of feeding 1.0 billion population.
更重要的是解决了十亿人口的吃饭问题。
The population problem may be the greatest one of the world today.
人口问题也许是当今世界上最严重的问题。
Given that women are 50.8 percent of the population, this in itself is a problem.
鉴于妇女的百分之50.8的人口，这本身就是个问题。
The population growth is the main cause of urban problem.
人口的增长才是大城市问题的主要原因。
The population growth is the main cause of urban problem.
人口的增长才是大城市问题的主要原因。
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