四面体的

Halogen ion can enter and break the phosphate glass network when they exceed certain content. The short range structure of metaphosphate and polyphosphate glasses are all built with phosphate chains. Most of lead ions still act as network modifiers, and some lead ions enter glass network to form tetrahedron or Pb-O-P linear linkages.

Br〓和F〓离子达到一定浓度时就会进入网络，使得玻璃网络发生断裂。P〓O〓含量为50mol％和40mo1％的玻璃样品结构都为链状结构，一部分pb〓离子进入玻璃网络中作为网络形成体，形成四面体或Pb-O-P键：而大部分的pb〓离子仍然作为网络修饰本。

This paper shows the importance of ability of iron to occur on both the tetrahedral and octahedral sites of the spinel structure.

表明铁离子出现在尖晶石结构中四面体间隙位和八面体间隙位的能力是极为重要的。

A parallelepiped bounded by six similar faces (either rhombuses or parallelograms).

有六个面的平行四面体（或是棱形的或是平行四边形的）。

OpengL use of light, materials, a list of technologies, the realization of a simple regular tetrahedron, the reference for beginners.

详细说明：利用OpengL的光照、材质、列表技术，实现一个简单的正四面体，适合初学者参考。

Magnetospheric MultiScale mission design needs spacecrafts flying in a regular tetrahedron configuration about the apogee of an elliptical orbit.

Magnetospheric MultiScale任务利用椭圆轨道远地点附近的正四面体航天器编队，协同完成对地球磁层结构和动力学特性的测量和分析。

The deployable mechanism of a tetrahedral module is discussed.

讨论了四面体单元的展开收拢过程以及单元的工作机理。

In this method, FEM and BEM decrease the calculation time, and tetrahedral element method can avoid deformation element.

有限元和边界元相结合的方法大大减少了计算工作量和计算时间；模型中采用四面体单元剖分线性单元网格，很好地避免了传统方法中出现的准六面体畸形网格。

This article uses Laplace equation, separating tetrahedron as various units and the using the appropriate form function to discrete the complex structure, surface and its environment.

采用电化学场中的拉普拉斯方程，使用四节点四面体和合适的形状函数对水室表层和复杂结构体系周围场域进行离散。

Then an improved method of Layer tetrahedron: Auxiliary contour method is described in detail and experimental results are given.

本文重点叙述了对断面层次四面体重构法的改进算法：辅助轮廓线法，并给出相应的实验结果。

We have also successfully synthesized Pt nanoparticles of different shapes such as tetrahedron and cube by fasten silicon at room temperature.

我们同时成功的在室温下，合成了不同形状的奈米铂，如四面体和立方体在矽基板上。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了