单词：upper alimentary tract
upper alimentary tract的用法和样例：
例句
- Hemobilia is manifested by upper gastrointestinal bleeding.胆道出血表现为上消化道出血。
- This occurs most often in the esophagus, but may also be seen elsewhere in the GI tract.常常发生在食管，但也可以发生在上消化道任何地方。
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