Children’s hygiene habits 05-001-017
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Abstract
A child standing in front of a room with door being open for better ventilation.
Description
Slide caption: Mind ventilation in children's bedroom.
标题：孩子睡觉的房子里，要注意通风换气。
标题：孩子睡觉的房子里，要注意通风换气。
Keywords
Children--Health and hygiene, photographs