Uh...actinic keratosis is, uh, a premalignant lesion.

光线性角化 呃 一种变。

However, most lip vermillion cancers result from chronic sun damage and are associated with actinic cheilitis, a precancerous rough patch on the lip.

但，多数唇红由慢性日光损害导致且和日晒性唇炎（即嘴唇上出现粗糙斑块）有关。