The judge methods of offset rationality is deduced at element local coordinate, and ensure that the element plane distance between after offset and before is close to the offset distance.
推导了在单元局部坐标系下判断等距合理性的计算方法，并且保证了等距前后单元所在平面之间的距离尽可能地接近所要等距的距离。
Objective To discuss the rationality and clinical significance of total mesorectal excision (TME) assessed by the pattern of local recurrence of rectal cancer.
目的从直肠癌术后局部复发形式探讨直肠系膜全切除（TME）的合理实施及临床意义。
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