接着，通过求解局部扩张血管段内的血液流动方程，导得血液流速、压力和血管壁切应力的分析表达式。

Through solving the blood flow equations for local vessel expansion region, the analytical expressions of blood flow velocity, pressure and wall shear stress were then obtained.

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这是准备髁间切迹、建立胫骨隧道、在完全屈膝前放置股骨导针的最佳工作角度。

This is the best working Angle to prepare the notch, drill the tibial tunnel, and initiate the femoral guide pin before fully flexing the knee.

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求切平面方程的一般方法是先求切平面的法向量(借助偏导)，再用点法式写出切平面的方程。

The common method to quadric surface equation is to get the Normal Component first, and then write out the equation through dot method.

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