名词
中文翻译：肛门沟
同义词：
['anal sulcus', 'anal canal', 'anal fornix']
例句：
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1.The doctor advised him to avoid eating too much meat and to keep his anal groove clean.
医生建议他少吃肉，保持肛门沟清洁。
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2. During the surgery, the surgeon had to make a small incision in the patient's anal groove.
手术期间，外科医生必须在患者的肛门沟处做小切口。
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3.The patient was instructed to change into a clean underwear before entering the operating room.
患者被告知在进入手术室前换上干净的内衣。