人耳深处都有敏感细胞，他们负责将声波转化成脑电流，一旦这些敏感细胞受到损伤，要想恢复很难。
Once the sensitive cells deep in the ear that convert sound waves to electrical impulses are destroyed by loud noise, they cannot be restored.
可是，新试验更敏感，能在几小时内测出细胞损伤。
The new tests, however, are more sensitive and can detect cellular damage within hours.
在较低的刺激脑损伤火灾，造成敏感性增加光线和噪音，以及疼痛放大。
The injured brain fires at lower stimuli, resulting in increased sensitivity to light and noise, as well as pain amplification.
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