noun🔗Share四边形 A geometric shape with four angles and four straight sides; a four-sided polygon."The park's playground had a large, colorful quadrangle of rubber padding for the children to play on. "公园里的游乐场有一大块色彩鲜艳的橡胶垫，是四边形的，孩子们可以在上面玩耍。mathareafigurestructurebuildingarchitectureChat with AIVocabulary GamePractice Reading
noun🔗Share四方形庭院，矩形庭院 A courtyard which is quadrangular."The students gathered in the quadrangle between classes to chat and eat lunch. "学生们在课间聚集在四方形庭院里聊天和吃午饭。architectureareabuildingChat with AIVocabulary GamePractice Reading
noun🔗Share四合院，庭院建筑。 The buildings forming the border of such a courtyard."The quadrangle of the school is a beautiful place to relax during lunch. "学校的四合院建筑群是午餐时放松身心的好地方。architecturebuildingChat with AIVocabulary GamePractice Reading
