Sociocultural factors had only a indirect influence on physical activity. 社會文化因素對身體活動只有間接影響力。
The indirect effect is the view that everything is changing in the world, which makes his modification to romanticism. 進化論的間接影響來自於萬物變化的觀點，此觀點促成其對浪漫主義自然觀的修正。
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