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人群与生物因素的关系十分密切。人类的新陈代谢过程,就是与自然界进行物质交换的过程。例如:绿色植物利用日光进行光合作用,从空气、
The relationship between population and biological factors is very close. The process of human metabolism is the process of material exchange with nature. For example: green plants use sunlight for photosynthesis, from the air,