几何规定旋转对称只能以二次,三次,四次和六次存在。
Geometry dictates that only two -, three -, four - and six-fold 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。
That is impossible. Geometry dictates that only two-, three-, four- and sixfold rotational symmetry can exist.
本文用四次方程代替常用的几个二次方程曲线的回转体,来描述对称裂交的大形变过程。
In the paper, large deformation of symmetry fission has been described by a biquadratic surface revolution instead of several quadratic equations.
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