noun🔗Share四边形，四角形 A polygon with four sides."The teacher asked us to draw a quadrilateral, so I drew a shape with four straight sides. "老师让我们画一个四边形，所以我画了一个有四条直边的图形。mathfigureChat with AIVocabulary GamePractice Reading
noun🔗Share四角防御地带, 四角要塞区 An area defended by four fortresses supporting each other."The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano."威尼斯四角防御地带包括曼图亚、佩斯基耶拉、维罗纳和莱尼亚诺。militarybuildingareaChat with AIVocabulary GamePractice Reading
adjective🔗Share四边形的，有四条边的 Having four sides."The backyard is a quadrilateral space, fenced in on all four sides. "后院是一个四边形的场地，四周都用栅栏围了起来。mathfigureChat with AIVocabulary GamePractice Reading
