因头发长长而消失
to disappear as your hair grows
I had a perm a year ago and it still hasn't grown out.我一年前烫的发,现在发型依旧。
grow sth out
让头发长长以变换发型
to allow your hair to grow in order to change the style
I've decided to grow my layers out.我决定留长发好让层次消失。
释义来自《牛津高阶英汉双解词典》第 9 版