PHL：永久性听力损失

“永久性听力损失”（Permanent Hearing Loss，简称PHL）是医学领域中常用的专业术语，尤其在英国的医疗体系中被广泛使用。该缩写形式便于医护人员在病历记录和专业交流中快速书写与沟通，指的是因内耳或听神经损伤导致的不可逆听力下降。

On the battlefield, a soldier's hearing can be permanently damaged in an instant by the boom of an explosion, and thousands of soldiers returning from Iraq have some permanent hearing loss.
在战场上，一个爆炸的隆隆声在一瞬间永久破坏了一位士兵的听力，而数千的从伊拉克返回的士兵都有着永久性的听力丧失。
But if they listened for longer periods, they risked permanent hearing loss after five years.
而如果听得时间更长，那么五年之后就可能会永久丧失听力。
In addition, the research confirms that exposure to excessive noise is the main avoidable cause of permanent hearing loss.
此外，该研究证实，在可能引起永久性失聪的各项因素中，暴露于过大的噪声是主要可避免因素。
Damaged hair cells in the inner ear are associated with permanent hearing loss, as hair cells cannot regenerate or be replaced.
内耳毛细胞受损后的不能再生或修复与永久性听力丧失相关。
Millions of youngsters across Europe could suffer permanent hearing loss after five years if they listen to MP3 players at too high a volume for more than five hours a week, EU scientists warned.
欧盟的科学家们向欧洲数百万年轻人发出警告，如果他们以过高的音量每周听MP3超过五个小时的话，五年后可能会永久失聪。

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