Definition: helpful or useful Level: C1
她给我的项目提供了一些建设性的建议。
She gave me some ___constructive advice on my project.
他的评论总是有帮助且建设性的。
His comments were always helpful and ___constructive.
我们进行了一次建设性的讨论，最终找到了解决方案。
We had a ___constructive discussion that led to a solution.
