cyclic quadrilateral,

圆内接四边形(cyclic quadrilateral)是一个几何概念,是指四个顶点均
预订 a cornucopia of quadrilaterals [9781470453121]
三角单元 (triangle element) 四边形单元 (quadrilateral element)
nir light-activated upconversion semiconductor photocatalysts
三角单元 (triangle element) 四边形单元 (quadrilateral