But also because of the cumulative, chemical effects of the oils, dirt, and sweat in your fingers over time.

还因为随着时间的推移，你手指上的油脂，污垢和汗水会累积产生化学效应。

It seems that receptors without GluA2 are much more permeable to calcium flow, and that makes them vulnerable to the harmful chemical effects of loud noises.

似乎没有 GluA2 的受体对钙流更容易渗透，这使得它们更容易受到噪音的有害化学影响。