空间可以向球面一样有正的曲率，也可以像马鞍面一样有负的曲率。
Space can have positive curvature, like the surface of a sphere, or negative curvature, like the surface of a saddle.
数值计算发现通过调整像面位置或入臂长度均能够补偿曲率半径的误差。
As is shown through the calculation, the radius error can be compensated by adjustment of the detector's position or entrance slit distance.
数值计算发现通过调整像面位置或入臂长度均能够补偿曲率半径的误差。
As is shown through the calculation, the radius error can be compensated by adjustment of the detector's position or entrance slit distance.
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