Newly developing countries are beginning to industrialise, primarily in Africa, with high to very highpopulation growth rates, and characterised by a predominantly young age profile.
新发展中国家正在开始工业化，主要是在非洲，人口增长率一再提高，以年轻化为显著特征。
2
The region has a very highpopulation density.
这一地区人口密度很高。
《柯林斯英汉双解大词典》
3
Crown of thorns starfish normally live in highpopulation densities.