axial skin flap

例句：

1. 1. The axial symmetry of the structureis important for its function.
   该结构的轴对称性对其功能至关重要。
2. 2. Theaxis of rotation is theline that connects the centerof rotation to the point of rotation.
   旋转轴是连接旋转中心和旋转点的水平线。
3. 3. The axial load isthe force applied perpendicular tothe axis of rotation.
   轴向荷载是垂直于旋转轴施加的力。