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. 溃疡 In addition to headaches, you may develop stomach ulcers as well. 除了头痛，你还可能患上胃溃疡。 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 溃疡 a mouth /stomach ulcer 口腔／胃溃疡 返回 ulcer