| 单词 | ulcer |
| 释义 | ulcer n. 1. an open sore on an external or internal surface of the body, often forming pus. 2. a a moral blemish. b a corroding or corrupting influence etc. Derivatives ulcered adj. ulcerous adj. Etymology: ME f. L ulcus -eris, rel. to Gk helkos |
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