ditrigonal scalenohedral class
复三方偏三角面体类
Any of several forms of crystal with trapeziums as faces.
偏方三八面体任一种各面均为不规则四边形的水晶体
the trigonometry of spherical triangles.
球面三角形的三角学。
Three such arrangements come to mind: a planar hexagon, similar to the benzene ring, and two solid polyhedra, the trigonal prism and the octahedron.
故而,有三种排列方式：平面六边形,类似苯环；两个立体多面体：三棱柱和八面体,
Threefold Analysis and Instruction of Errors in Generalized Transitional Relative Clauses;
广义转折关系复句偏误的三个平面分析与教学
Use the Trigonometric Function Solutions of Fourth Order Equations to Study the Event Horizon of Non-sphere Symmetric and Non-stationary Black Hole
基于四次方程的三角解研究非球对称动态黑洞的“类视界面”
the base of a triangle, pyramid, etc
三角形的底边、 角锥体的底面等.
Procedure of Intersection and Trimming for Composite Triangular Bézier Surface
复合三角Bézier曲面求交和裁剪的实现
The 3D Reconstruction of Recovering Surface Texture from Free Multiple Views
自由多视角恢复表面纹理的三维重建
The Total Shift and Evolution of the Yangze River Delta Container Port System;
长三角集装箱港口体系的偏移增长与演化模式
an octahedron with eight equilateral triangles as faces.
有八个正三角形面的八面体。
a tetrahedron with four equilateral triangular faces.
有四个等边三角形面的四面体。
Periodic Solutions for a Kind of Third Order Functional Differential Equation with Deviating Arguments
一类三阶具多偏差变元微分方程的周期解
Comparison of bias-variance structure of three classification algorithms:MCLP,LDA and C5.0
三种分类算法偏差-方差结构的比较:MCLP,LDA和C5.0
A Class of Finite Volume Method on Unstructured Triangular Meshes and Its Convergence;
一类非结构三角形网格有限体积方法及其收敛性
cocked hat ; hat with the brim turned up on three sides
三角帽（帽檐三面卷起的）.
Exact Solutions of Trigonometric Function to the Combined KdV-mKdV Equation;
组合KdV-mKdV方程的一类三角函数解
Parametric Method for Solving Periodic Tridiagonal Systems
求解一类周期三对角方程组的参数法
