quadrilateral form

例句：

1. 1. The design of the new building is a perfect example of a quadrilateral form.
   新建筑的设计是完美四边形形式的一个例子。
2. 2. The quadrilateral form of the car is very stable and easy to control.
   汽车的四边形形状非常稳定，易于控制。
3. 3. In mathematics, a quadrilateral form is a shape that has four straight sides.
   在数学中，四边形是一个有四条直边的图形。