| 单词 | permanent hearing impairment |
| 释义 | permanent hearing impairmentpermanent hearing impairmentA hearing impairment such that the average hearing levels measured are 40 dB or greater on all occasions. |
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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。