柯林斯词典parallelogram /ˌpærəˈlɛləˌɡræm/ (parallelograms) 1. N-COUNT A parallelogram is a four-sided shape in which each side is parallel to the side opposite it. 平行四边形 返回 parallelogram剑桥词典a flat shape that has four sides . The two sets of opposite sides are parallel and of equal length to each other. 平行四边形 返回 parallelogram