名词
中文翻译：静脉曲张
同义词：
['varicose veins', 'varicocele']
例句：
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1.He had a gangrenous toe that required amputation.
他的一个脚趾发生了坏疽，需要截肢。
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2.The patient's blood pressure was elevated due to the venous congestion in his legs.
患者的血压升高是由于腿部静脉充血引起的。
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3.The doctor advised him to exercise regularly to prevent gangrene.
医生建议他定期锻炼以防止坏疽。