柯林斯詞典?ulce?ration /??ls??re???n/ 1. N the development or formation of an ulcer 潰瘍形成 返回 ulceration劍橋詞典the process of forming an ulcer or ulcers 潰瘍形成 ulceration of the bowel 腸道潰瘍的形成 mouth ulceration 嘴部潰瘍的形成 返回 ulceration