abnormally dark tarry feces containing blood (usually from gastrointestinal bleeding)
双语例句
1. He was febrile and jaundiced. However, no hematemesis or melena was noted.
他有发烧和黄疸的症状，但是并没有吐血或血便的症状。
youdao
2. After operation, we closely observe the vital signs, eating situation, abdominal pain and abdominal distention, nausea and vomiting, whether hematemesis and melena of patients.
术后密切观察患者生命体征，进食情况，腹痛腹胀，恶心呕吐，是否有呕血及黑便。
youdao
3. Results: the symptoms of these 20 patients were non-specific, upper abdominal pain was most common and hunger pain, abdominal distention, nausea, vomiting, melena being the next.
结果：20例患者的临床表现均无特异性，上腹疼痛最为常见，其次是饥饿痛、腹胀、恶心、呕吐、黑便等。
youdao
4. Results: the symptoms of these 20 patients were non-specific, upper abdominal pain was most common and hunger pain, abdominal distention, nausea, vomiting, melena being the next.
