The National Institutes of Health National Institute on Deafness and Other Communication Disorders, or NIDCD, reports that 36 million American adults have some degree of hearing loss.

 
  • 美国国立卫生研究院耳聋及其他交际障碍项目或NIDCD报告称有36万成年美国人患有一定程度的听力丧失。
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