1.
primitive period parallelogram
基本周期平行四边形
2.
fundamental period parallelogram
原始周期平行四边形
3.
primitive parallelogram of period
周期的原始平行四边形
4.
Finite Element Analysis of the Anti-Plane Problem of a Doubly Periodic Parallelogram Array of Cracks
双周期平行四边形排列裂纹反平面问题的有限元分析
5.
parallelogram illusion
平行四边形错觉 平行四边形错觉
6.
A quadrilateral having no parallel sides.
没有平行边的四边形
7.
double link jib in parallelogram
平行四边形组合臂架
8.
parallel motion linkage
平行四边形悬挂装置
9.
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。
10.
Studies on the Characteristic Parallelogram Grid in Square System and Hexagonal Crystal System and the Improvement of the Electron Diffraction Pattern Demarcating;
四方和六方晶系基本特征平行四边形表的统一及电子衍射花样的标定分析与改进
11.
A quadrilateral having two parallel sides.
梯形一个有两条平行边的四边形
12.
A trapezoid is a quadrilateral with two parallel sides.
梯形是具有两平行边的四边形。
13.
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
14.
Analysis of Synchronous Welding Positioner Based on Ogram Mechanism;
基于平行四边形机构的同步式变位焊接机分析
15.
(in US) a quadrilateral with no parallel sides.
（在美国）没有平行边的四边形。
16.
(in US) a quadrilateral with two parallel sides.
（在美国）有两个平行边的四边形。
17.
a quadrilateral whose opposite sides are both parallel and equal in length.
相对的边平行且长度相等的四边形。
18.
a parallelogram with four right angles.
有四个直角的平行四边形。