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所以它是三角形金字塔。So it's trigonal pyramidal.

三角区和半卵圆中心7例。At trigonal and semiovale center 7 cases.

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它的形状是三角金字塔形。The shape is actually trigonal pyramidal.

半圆形舌盖，造型大方，方便开启。Trigonal tongue cover, generous sculpt, easy to open.

一个三角双锥体有三个赤道位和两个轴向位。A trigonal bipyramid has three equatorial and two axial positions.

两个锡原子为五配位的三角双锥构型。The tin atoms are five-coordinated with geometry of distorted trigonal bipyramid.

第三章研究了一维三方准晶的弹性问题。The third chapter investigated the elasticity problem of one dimensional trigonal QCs.

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建立了一种新的三棱柱配位结构伸缩变形和扭曲变形的计算方法。A new calculating method has been proposed for the elongation and twist of trigonal prism.

本文介绍了一种利用慢度曲面判断三方晶系晶体纯模轴的方法。A method of obtaining the pure mode direction of the trigonal system by the slowness surfaces is introduced.

结果表明，化合物中锡原子呈五配位畸变三角双锥构型。The structure shows a distorted trigonal bipyramidal configuration with five-coordinations to a central tin atom.

这种变化反映了人工烟水晶三方偏方面体单形结晶习性的变化。This reflects the change of the crystal-habit of the trigonal trapezohedron simple form in synthetic smoky quartz.

在该配合物的晶体中，锡原子呈五配位畸变三角双锥构型。In the crystals of the complex, the tin atoms are penta-coordinated in a distorted trigonal bipyramidal configuration.

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滇-黔-桂微细浸染型金成矿带处于滇-黔-桂裂谷中。The fine disseminated gold deposits in the trigonal area of Yunnan Guizhou Guangxi lie in the Yunnan Guizhou Guangxi rift.

内环锡和外环锡原子均为五配位的畸变三角双锥构型。Both endo-cyclic and exo-cyclic tin atoms are five-coordinated and have coordination geometry of distorted trigonal bipyramid.

采用埃夫琴晶胞推导了计算二维三角离子晶体的马德隆常数的通项公式。By Evjen crystal cell, the calculation formula about Madelung constant for the two-dimensional trigonal ion crystal was deduced.

太阳、天王星和木星三方面的结合将会给你带来更多的乐观主义和对不感兴趣的事物的排斥。The combined influences of the Sun, Uranus and Jupiter into trigonal with your sign brings to you optimism and more of corrosive.

运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.

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木星与天王星方面和你进入的行业表明外部的情况将你推向了展现自己的境况中。Jupiter and Uranus into trigonal with your sector indicate external circumstances which push you to too often camp on your positions.

在灰色定权聚类模型的基础上，提出了一种基于三角白化权函数的评估模型。The grey cluster model with fixed weights is introduced, then a new evaluation model based on trigonal whitenization weight function is formulated.

这里三角形是因为,我们有3个原子核中心原子成键，如果你画它，它就是金字塔形的。So it's trigonal because we have these three atoms that are bound to the central atom here, and if you picture it, it's actually shaped like a pyramid.