The estimated of congenital bilat - eral hearing loss is 0.17 % and of unilateral hearing loss 0.38 %.
双耳听障者均于3个月大时,开始接受厅语复健.
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It'sense d a min eral called hematite that offen forms under wet conditions.
它还发现了被称为赤铁矿的矿石的存在,这种矿石通常是在潮湿条件下形成.
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