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。
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。
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。
Firstly, the Green function's source point and field point symmetry and geometry symmetry are discussed, and based on these, symmetry properties used in the matrix solving are discussed.
首先分析了格林函数的场点源点对称性和几何对称性，并由此入手，对对称性在速度势求解矩阵中的应用进行了分析。
A modified computing symmetry axes algorithm is proposed for the geometry symmetry good property of skull image and the moment of inertia on the symmetry objects.
颅骨图像在几何上具有对称性特征，根据转动惯量在几何对称性对象上所具有的良好性质，提出一种改进的计算对称轴的算法，该算法利用计算机语言编程实现。
The results show that the static stress and displacement states are symmetrical on opposite sides of the axis whether the sample is symmetry in geometry or not.
证明在静态情况下，几何对称试件和几何非对称试件的轴线两侧均具有对称的应力和位移分布状态；
This algorithm has the merits of geometry expanding method and overcomes the difficulty for searching symmetry curve confronted by the "Geometric Mapping" method.
该算法既具有基于几何展开方法的优点，又克服了“几何映射法”必须寻找对称线的困难，使得一步成形模拟方法更具有实用性。
This algorithm has the merits of geometry expanding method and overcomes the difficulty for searching symmetry curve confronted by the "Geometric Mapping" method.
该算法既具有基于几何展开方法的优点，又克服了“几何映射法”必须寻找对称线的困难，使得一步成形模拟方法更具有实用性。
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