四面体的

Kaolin, one of inorganic material, is composed of more parallel crystal layers of octahehedrdal alundum and crystal layers of tetrahedral silica. Rasicals K-O· are formed hydroxyl by initiator. On the surface of octahedral alundum.

高岭土是由许多平行的铝氧八面体晶层和硅氧四面体晶层组成，铝氧八面体的OH在引发剂作用下可形成自由基K-O·，然后可引发丙烯酸-丙烯酸钠进行接枝聚合。

Nutlets dark brown, oblique subulate, trigonous-tetrahedral, 1-1.5 mm, shiny, usually glabrous, adaxial bottom surface prominent, 2 lateral surfaces equal, a longitudinal rib at their juncture; abaxial surface convex, ovate, acutely 3-ribbed; carpophore sharply curved.

小坚果暗褐色，斜的钻形，三棱四面体，1-1.5毫米，发亮，通常无毛，正面的底部表面突出，背面凸，卵形，尖锐3肋；果瓣柄明显地弯曲。

Nutlets dark brown, oblique subulate, trigonous-tetrahedral, 0.8-1 mm, smooth, glabrous, adaxial bottom surface slightly convex, somewhat smaller than 2 equal lateral surfaces; abaxial surfaces convex, ovate, acutely 3-ribbed; carpophore obscure, short.

小坚果暗褐色，斜的钻形，三棱四面体，0.8-1毫米，平滑，无毛，正面的底部表面有点凸，背面凸，卵形，尖锐3肋；果瓣柄阴暗，短。

At the same time, the trend of Kirie simplex is also confirmed by the distribution of tetrahedron coefficient.

同时，四面体系数的分布进一步证实Kirie单纯形的变化趋势。

The characteristic vibrational modes of PTB crystal were assigned to tetrahedra BO〓.

将PTB晶体的某些特征振动归属于BO〓四面体。

The characteristic vibrational modes of CBO and CLBO crystals were assigned to planar six-membered ring〓 and tetrahedra BO〓.

在对CBO和CLBO两种晶体的某些特征谱线进行归属时，将〓基团等效为一个〓六元环和BO〓四面体。

In GeS2-Ga2S3 glasses, the basic structural units forming the backbone ofthe network are GeS4/2 and GaS4/2 tetrahedra which are connected through a bridging sulfur to form a three-dimensional network.

在GeS_2-Ga_2S_3玻璃中，形成网络骨架的基本结构单元是GeS_(4／2)和GaS_(4／2)四面体，它们通过桥硫连接成三维空间网络。

The title complexes both have the well-known α-Keggin structure, based on a central PO_4 (GeO_4) tetrahedron surrounded by 12 MoO_6 octahedra arrayed in four groups of three edge-shared MO_3O_(13) octahedra.

标题化合物具有大家熟悉的α-Keggin结构，中心由PO_4(GeO_4)四面体周围有12个MoO_6八面体分成四组排列，每三个共边组成Mo_3O_(13)簇。

Study on the structure and stablities of anion cluster(SiO_2)_nX~-3MR (three-membered ring) structure, 2MR (two-membered ring) linear chain structure and pseudotetrahedral cage structure have been proposed for the anion cluster (SiO_2)_nX~-(n=1~5 X=_, 0, OH).

主要研究(SiO_2)_nX~-(n=1～5 X=_，O，OH)离子团簇的三类典型结构(三元环结构、二元环链状结构和四面体笼状结构)。

Results show that the multi micro-structure units coexist in the potassium silicate glasses,and with the increase of SiO2 content,the micro-structure from silicon-oxygen tetrahedron monomer to dimmer,chain,sheet and network step by step.

结果表明：钾硅酸盐玻璃有多种微结构单元共存，并且随二氧化硅含量的增加，微结构逐步由硅氧四面体单体向二聚体、链状、层状和网络状转化。

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