A system or practice for promoting and maintaining good health, personal cleanliness and personal habits such as proper washing of hands.
提高和维持人体健康、清洁和个人习惯的系统和规范，如经常洗手等。
A system or practice for promoting and maintaining good health, personal cleanliness and personal habits such as proper washing of hands.
提高和维持人体健康、清洁和个人习惯的系统和规范，如经常洗手等。
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