【Shu-Hui Lin】評論
If you hear ringing in your ears or things sound muffled after listening,you've overdone it.（在收聽後如果你聽見耳鳴或聲音聽起來模糊，那麼就有點超過了。）
【Yi Ting Lin】評論
permanent 口語上也有燙髮的意思。ex: she went to salon for a permanent.