Teenagers often develop striae on their skin during rapid growth spurts.

striae 是名词 stria 的复数形式，来自拉丁语，原意为"条纹、沟痕"。在医学领域特指皮肤上出现的线状纹路，即"生长纹"或"妊娠纹"，常见于青春期快速生长或体重急剧变化时。