The region has a very high population density.
这一地区人口密度很高。
The population density of that country is 685 per square mile.
那个国家的人口密度为每平方英里685人。
This region has a high population density.
这个地区人口密度很大。
They have never had a high population density.
他们从来没有过很高的人口密度。
They have never had a high population density.
他们从来没有过很高的人口密度。
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