ulcerKK [ˈʌlsɚ] ｜ /ˈʌlsɚ/
GEPT 中高級
C2noun
An open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane that fails to heal and often becomes infected
The elderly woman’s foot ulcer had become infected, causing severe pain and requiring immediate medical attention.
潰瘍；潰爛