乔的听觉几乎从他一出生就开始减退了。
Joe's hearing started declining almost the moment he was born.
其它症候变化较多，例如足部下凹、脊柱侧凸、听觉灵敏度的减退或者糖尿病的出现。
Other signs are inconstant, such as the presence of hollow feet, scoliosis , decrease of the auditive acuteness or diabetes.
目的探讨年龄相关性听力减退大鼠听觉系统抗氧化能力随月龄增长的变化。
Objective to investigate the changes of antioxidation in the auditory system in Wistar rats with the age-related hearing impairment.
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