逐词背单词_轻松背单词

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逐词背单词第9级

学习进度：1/1000

ulcer [ˈʌlsə(r)]

基本释义：n.溃疡，腐坏物
英英释义：a break in the skin or on the surface of an organ inside the body , which does not heal naturally

参考例句：

1. She had an ulcer in her mouth. 她口腔出现溃疡。
2. A bacterium is identified as the cause for his duodenal ulcer. 一种细菌被断定为造成他十二指肠溃疡的根源。

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