1·Our maths teacher told us a square is a special quadrangle.
数学老师告诉我们正方形是一个特殊的四边形。
2·We deduced equal perimeter inequality of triangle and quadrangle by elementary mathematical methods first and solved general equal perimeter problems by using methods of Fourier series.
本文首先使用初等方法导出三角形与四边形的等周不等式，进而用富里埃级数方法解决了一般等周问题。
3·A new vision location algorithm from plane quadrangle is proposed.
针对平面四边形提出一种新的视觉定位算法。
4·At present, the transform in IFS is limit to affine transform. However, affine IFS is unable to do anything with the anomalous dissection on discretionary quadrangle area.
目前迭代函数系统中的变换多限于仿射变换，而仿射迭代函数系统对于区域的任意四边形不规则剖分情形是不能实现的。
5·Except automatic generation quadtree method and interaction mapping method, few methods could generate quadrangle mesh.
除了全自动的改进四叉树法和交互的映射法，只有少数方法生成四边形网格。
1·In this dark 2004 drama, she played a London-based photographer caught in a love quadrangle (with Jude Law, Clive Owens, and Natalie Portman).
在这部摄于2004年，充满灰暗色调的戏中，她扮演了一个陷于四角恋的伦敦摄影师。