名词
中文翻译：回肠
同义词：
['sigmoid colon', 'sigmoid loop例句：1. The patient had a sigmoid colon tumor removed during surgery.（患者手术中切除了一个回肠肿瘤。）']
例句：
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1. The patient had a sigmoid colon tumor removed during surgery.
患者手术中切除了一个回肠肿瘤。
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2.The sigmoid colon is the last part of the large intestine.
回肠是大肠的最后部分。
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3.The sigmoid colon is where most of the waste from the body is expelled.
回肠是身体大部分废物排出的地方。