以下为句子列表：
英文: A branch of the lateral femoral circumflex artery is encountered when exposing the proximal fourth of the femur and the superior lateral genicular artery in the distal fourth; these may be clamped, divided, and ligated without harm.
中文: 显露股骨近端四分之一段时可见旋股外侧动脉分支，而在远端四分之一可见膝上外侧动脉；这些血管可被钳夹、切断和结扎，而不会造成损害。
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英文: A fixing ring at distal end ensures fixation and depth of insertion.
中文: 头端增配定位圈，既好定位又可作深度保证。
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英文: At laparotomy, duodenal dverticulitis and one enterolith obstructing the distal ileum were found.
中文: 术前诊断为十二指肠憩室病合并肠阻塞，于是我们进行小肠切开并摘除肠石。
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英文: Colonoscopy was the main diagnostic approach for distal ileal and colorectal lesions.
中文: 肠镜下可见不同病期的多样性表现。
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英文: Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar.
中文: 摘要下颚牙弓空间不足或第二大臼齿本身过度的近心轴向倾斜，常造成第二大臼齿前倾和阻生。
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