柯林斯词典ulcer /ˈʌlsə/ (ulcers) 1. N-COUNT An ulcer is a sore area on the outside or inside of your body which is very painful and may bleed or produce a poisonous substance. 潰瘍 In addition to headaches, you may develop stomach ulcers as well. 除了頭痛，你還可能患上胃潰瘍。 返回 ulcer剑桥词典a break in the skin , or on the surface of an organ inside the body , that does not heal naturally 潰瘍 a mouth /stomach ulcer 口腔／胃潰瘍 返回 ulcer