Z . zhang , m . wollgarten and k . urban , " analysis of dislocations in icosahedral al - cu - fe alloy by transmission electron microscopy " , phil . mag . lett . , 61 ( 1990 ) 125 - 131 “铝铜铁二十面体准晶中位错的透射电子显微学分析” , <哲学杂志快报> , (英国)
In order to improve the roundness of the icosahedron , its surfaces are divided into smaller ones and more points are raised to the surface of the sphere 为了令正二十面体的外形更接近球体，我们把它的面分解成更小的面，并将更多的端点升到球体表面。
All graphs are finite simple undirected graph with no isolated vertices in this paper . it is completed the classification of graphs on which a semidihedral group acts edge - transitively 摘要运用图的自同构理论，获得了关于半二面体群边传递的图的完全分类。
The toy is a giant billiard ball filled with blue liquid and a clear window that looks in on a shape , which floats in the liquid , with 20 sides 这种玩具是个巨大的撞球，里面装满了蓝色的液体，还有一个清楚的窗口，通过该窗口可以看到一个漂浮在液体中的20面体。
After additional testing and analysis of several hundred dimpled configurations and shapes , the icosahedron pattern with 20 triangular regions was developed 在对几百种酒窝结构与形状进行了附加测试与分析之后，终于设计出一种二十面体的式样，其中每个面皆为三角形。
Z . zhang and w . geng , " direct observation of misfit dislocations at the interface between a decagonal quasicrystal and its epitaxial crystalline layers " , phil . mag . lett . , 65 ( 1992 ) 211 - 218 “十面体准晶与其表面晶体之间界面失配位错的直接观察” , <哲学杂志> , (英国)
Complete cubic octahedral crystal crystal shape , high strength and thermal stability . having wide cutting range . suitable for high - power saws and geological broach 具有完整的立方八面体晶形，高强度和热稳定性。在高冲击条件下，具有较高的锯切范围。适用于大功率锯切，优质钻头。
Illustration credit : kevin sahr , denis white in order to improve the roundness of the icosahedron , its surfaces are divided into smaller ones and more points are raised to the surface of the sphere 为了令正二十面体的外形更接近球体，我们把它的面分解成更小的面，并将更多的端点升到球体表面。
