These countries are catching up, but largely without the economic means to cope with the social and economic challenges posed by such a profound demographic shift.
这些国家正在追赶上来，但它们大多数都没有经济手段来应对由这种深刻的人口变化所带来的社会和经济挑战。
2
The survey found some notable demographic patterns in the public's perceptions of social conflicts.
调查发现，公众对社会冲突的看法存在一些明显的人口统计学模式。
3
Blacks, in particular, consistently see more social conflict than do other demographic groups.