自然素质即先天遗传的生理素质，例如神经系统、身高、体重、骨骼的特点；运动素质、负荷限度、适应和抵抗能力等生理机能的特征。这是一个人身心发展的物质基础，为人的身心发展提供极大的可能性。
人的自然素质和主体素质都不能够孤立地存在，需要融合于人的社会素质之中。
The natural qualities and subject qualities can not exist isolatedly, and must be merged with social qualities.
人口社会素质的改善对人口整体素质的提升所起到的作用要大于人口自然素质。
The improvement of social quality played a more important role than that of natural quality in improving the overall population quality.
人的本质在教育学层面上表现为人的素质，即人的自然素质、社会素质和主体素质。
The demonstration of human nature in terms of education is identified by people's qualities (e. q. natural qualities, social qualities and subject qualities).
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