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zheng chang de xing sheng huo you li yu zuo bing yan nian
Pages: 41-43
Year: Issue:  1
Journal: Regimen

Abstract: <正> 房事活动是人类的生理本能,也是一种自然的、健康的行为。正常的性生活可以达到"接阴阳以为强",补益身体,祛病延年,健康长寿的目的。
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