| 1. | Only a fraction of the a ions are in tetrahedral sites .
只有一部分A离子处在四面体的位置上。 |
| 2. | A satisfactory theory must be able to explain why in methane the hch angles all have the characteristic tetrahedral value .
一个完满的理论必须能够解释甲烷中为什么所有HCH角都具有四面体的特性值。 |
| 3. | Only a fraction of the a ions are in tetrahedral sites
只有一部分a离子处在四面体的位置上。 |
| 4. | A satisfactory theory must be able to explain why in methane the hch angles all have the characteristic tetrahedral value
一个完满的理论必须能够解释甲烷中为什么所有hch角都具有四面体的特性值。 |
| 5. | In this article , we introduce the oriented volume concept of simple tetrahedral , and get the computation formula for polyhedron at last
引入了简单四面体的有向体积概念，最后得多面体体积计算公式。 |
| 6. | Tetrahedral outside heart of the ball that receive a ball is in tetrahedral interior , exterior or on the face , right tetrahedral what demand is there ? ?
四面体的外接球球心在四面体的内部,外部或者是面上,对四面体有什么要求? ? |
| 7. | This is the top view of an oxygen - silicon tetrahedron . the four large spheres represent oxygen atoms , and the dark one represents a silicon atom
这是一个硅氧四面体的俯视图。图中四个大的圆球代表氧原子，那个暗色的圆球则代表一个硅原子。 |
| 8. | These conclusions are expounded on the basis of the peculiarity of cube and regular tetrahedron of dna sequences , so they are rationalization , and they will be very useful in the study of the classification and the evolution of organisms
它们都是根据dna序列的立方体和正四面体的性质而提出来的，有一定的合理性。本文的结论对人们研究生物体的分类和进化有着很重要的作用。 |
| 9. | Marching cubes ( mc ) algorithm and marching tetrahedra ( mt ) algorithm are introduced . this dissertation chooses mt algorithm to extract zero isosurface in order to avoid ambiguity of mc algorithm . in accordance with the intersection feature between isosurface and voxel , this dissertation improves mt algorithm and proposes nine configurations of distance function values of tetrahedron vertices
分析marchingcubes ( mc )算法的二义性，选择marchingtetrahedra ( mt )算法进行“ 0 ”等值面的抽取；并根据等值面与体素相交的特点，对mt算法进行改进，提出四面体的顶点9种分布情况。 |
| 10. | As its abundance is rare , it is very valuable . it appears in native usually as colourless precious stone , and is useful for cutting things and in jewellery . each atom in diamond is bonded to four others in a tetrahedral arrangement which gives the structure considerable intrinsic strength and hardness
金刚石是非常罕有且珍贵的碳，在金刚石中，每个碳原子都以正四面体的排列方式与另外三个碳原子连接，因此破坏这种化学键需要极大的能量，因此金刚石十分坚硬，主要用作金属及珠宝切割的用途。 |
