该两个翼型处在不同的黎曼面内。
These two airfoils lie on different Riemann sheets in the hodograph plane.
后来发现可以通过引入仿射参数而避开双值性，实质上是将两叶黎曼面分别映射到 仿射参数空间。
The double-valued problem can be simplified by introducing an appropriate affine parameter, namely, mapping the two Riemann sheets on the plane of the spectral parameter to the affine parameter space.
后来发现可以通过引入仿射参数而避开双值性，实质上是将两叶黎曼面分别映射到 仿射参数空间。
The double-valued problem can be simplified by introducing an appropriate affine parameter, namely, mapping the two Riemann sheets on the plane of the spectral parameter to the affine parameter space.
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