ulcer

名词 ulcer:

1. a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue
   同义词：ulceration

1. His ulcer has kicked up again.
   他的溃疡又发病了
2. An ulcer located at the initial point of entry of a pathogen.
   初疮病原体最初侵入的那点处的溃疡
3. My mouth has an ulcer.
   我的口腔出现了溃疡。
4. The old man has a stomach ulcer.
   那个老人得了胃溃疡。