constructiveadj.建设性的；构造上的；作图的constructive contract准契约constructive comments积极的评论constructive dialogue建设性对话constructive learning建构性学习constructive boundary建设性板块边界constructive analysis构造性分析Constructive projects建筑工程constructive teaching建构主义教学constructive proposal建设性意见constructive property可构造性质