... racial hygiene 种族卫生 physiological hygiene 生理卫生 animal hygiene 动物卫生学 ...
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Learning the physiological features and hygiene education of the puberty, it's important to develop the younger's excellent psychological qualities and sound bodies.
了解青春期的生理变化特征及其卫生，对青少年身心的健康成长和良好心理素质的培养具有重要意义。
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