Nhạc từ đồ chơi có thể gây điếc cho trẻ
Một số đồ chơi phát ra âm thanh dành cho trẻ em có thể gây tổn hại vĩnh viễn đến khả năng nghe của trẻ, các nhà khoa học thuộc Viện tai - Trường ĐH London cảnh báo.
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