constructiveness

例句：

1. 1. The project was well-constructed and had a positive impact on the community.
   这个项目结构良好，对社区产生了积极影响。
2. 2. The teacher's feedback was very constructive and helped the student improve their skills.
   老师的反馈非常具有建设性，帮助学生提高了技能。
3. 3.The company's decision to invest in renewable energy sources was highly constructive towards the environment.
   公司决定投资可再生能源资源，这对环境非常具有建设性。