名词
中文翻译：慢性溃疡同义词
同义词：
['chronic ulcer', 'chronic gastric ulcer', 'chronic duodenal ulcer']
例句：
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1. He has been suffering from a chronic ulcer for years.
他多年来一直患有慢性溃疡。
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2. The doctor diagnosed him with a chronic ulcer and prescribed medication.
医生诊断出他患有慢性溃疡，并开了药。
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3. Chronic ulcers can be difficult to treat and require regular monitoring.
慢性溃疡难以治疗，需要定期监测。