The population has already begun to show its displeasure at the slow pace of change.
人民已经开始对变化的缓慢速度表示不悦。
This change has occurred in a period of fast population growth among low-income families.
而且这一变化发生于低收入家庭人口迅速膨胀的时期。
Change of rhizosphere effect was another important factor of population decline.
根际效应的改变是引起差巴嘎蒿种群衰退的又一重要因素。
With the change of time and place, the economic effects of population growth will change.
受各种因素的影响，人口增长的经济效应可能依时间、地点而有明显的差异。
Age Structure Change of World Population.
全球人口年龄结构变迁。
Age Structure Change of World Population.
全球人口年龄结构变迁。
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