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1·The glenoid fossa exhibits retroversion and a spiral twist in the horizontal plane, this anatomy property should be considered in the design of shoulder prosthesis.

肩胛盂窝在轴位（水平）平面呈后倾改变及螺旋性扭曲改变，在肩关节假体设计中应考虑此解剖特点。

2·The transepicondylar axis of different position has no effect on volume rendering technique measuring the humeral head retroversion angle with multi slice spiral CT.

肱骨远端不同位置内外上髁轴线对多层螺旋CT容积再现测量肱骨头扭转角没有影响；

3·Advancement historiography is the essential reflection of history process in comparison with the existed advancement historiography, circulation historiography and retroversion historiography.

比较人类曾经有过的进步史观、循环史观和倒退史观，可发现只有进步史观是历史过程本质的反映。

倒退

1·Advancement historiography is the essential reflection of history process in comparison with the existed advancement historiography, circulation historiography and retroversion historiography.

比较人类曾经有过的进步史观、循环史观和倒退史观，可发现只有进步史观是历史过程本质的反映。