1.
Amelioration about the Demonstrator of Force Parallelogram Formula;
关于力的平行四边形定则演示仪的改进
2.
parallelogram rule for addition of vectors
向量加法之平行四边形法则
3.
parallelogram illusion
平行四边形错觉 平行四边形错觉
4.
A quadrilateral having no parallel sides.
没有平行边的四边形
5.
double link jib in parallelogram
平行四边形组合臂架
6.
fundamental period parallelogram
原始周期平行四边形
7.
parallel motion linkage
平行四边形悬挂装置
8.
primitive period parallelogram
基本周期平行四边形
9.
primitive parallelogram of period
周期的原始平行四边形
10.
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。
11.
A Mathematical Model for the Parallelogram Method in Ratemaking;
费率厘定平行四边形方法的数学模型(英文)
12.
A quadrilateral having two parallel sides.
梯形一个有两条平行边的四边形
13.
A trapezoid is a quadrilateral with two parallel sides.
梯形是具有两平行边的四边形。
14.
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
15.
This construction is often called the parallelogram law of addition of vectors.
这种作图法常被称为矢量相加的平行四边形法则。
16.
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
17.
(in US) a quadrilateral with no parallel sides.
（在美国）没有平行边的四边形。
18.
(in US) a quadrilateral with two parallel sides.
（在美国）有两个平行边的四边形。