Geometry dictates that only two -, three -, four - and six-fold rotational symmetry can exist.

几何规定旋转对称只能以二次，三次，四次和六次存在。

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That is impossible. Geometry dictates that only two-, three-, four- and sixfold rotational symmetry can exist.

然而几何学告诉我们，只有二次、三次、四次和六次的旋转对称是能够存在的形式。

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Acoording to the crystal symmetry, diffraction geometry and the diffraction laws, the complicated divergent beam X-ray diffraction has been studied.

根据晶体的对称性、衍射几何和衍射规律，研究了复杂的发散X射线晶体衍射。

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Geometry dictates that only two-, three-, four- and sixfold rotational symmetry can exist.

ECONOMIST: The 2011 Nobel prizes