Let's say that we want to find the area of an ellipse with semi-axes a and b. OK, so that means an ellipse is just like a squished circle.

现在需要计算一个以a，b为半轴的椭圆的面积,其实椭圆就是一个被压扁的圆。

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There is angular between the longer axes of the ellipse and the axes of the shaft, moreover, the angular is variable with the magnitude and the direction of the load.

本文证明该椭圆长轴和传动轴应该呈一定的夹角，而且夹角值随工作载荷的大小和方向的变化而变化。

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