1.
A Algorithm for Vision Location Based on Plane Quadrangle
一种基于平面四边形的视觉定位算法
2.
TWO Theorems of Directed Areas for Planar Quadrilaterals and Their Applications;
平面四边形有向面积的两个定理及其应用
3.
A plane figure with four sides and four angles.
四边形有四个边和四个角的平面图形
4.
A four-sided plane figure with opposite sides parallel.
平行四边形一种有四条边且每两条边对应平行的平面图形
5.
a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms.
每个底部是边数相同的多面形且其它面是不等边四边形或平行四边形的旁面三角台。
6.
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）。
7.
parallelogram illusion
平行四边形错觉 平行四边形错觉
8.
A quadrilateral having no parallel sides.
没有平行边的四边形
9.
A four-sided planar figure with a diamondlike shape; a rhombus that is not a square.
菱形钻石形状的四边平面图形；不是正方形的菱面体
10.
a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms.
有两个全等平行面（底面）且侧面都是平行四边形的多面体。
11.
(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon.
（几何）有四个相等的边和四个直角的平面长方形；有四个边的等边多角形。
12.
A prismatoid having polygons with the same number of sides as bases, and faces that are parallelograms or trapezoids.
平截头棱椎体以边数相同的平面多边形为底面的，各侧面为平行四边形或不规则四边形的拟柱体
13.
a parallelogram with four equal sides; an oblique-angled equilateral parallelogram.
四个边相等的平行四边形；不是直角的等边平行四边形。
14.
double link jib in parallelogram
平行四边形组合臂架
15.
fundamental period parallelogram
原始周期平行四边形
16.
parallel motion linkage
平行四边形悬挂装置
17.
primitive period parallelogram
基本周期平行四边形
18.
primitive parallelogram of period
周期的原始平行四边形