0 If advice, criticism, or actions are constructive, they are useful and intended to help or improve something. -- 建設性的；有益的；有用的；積極的
She criticized my writing, but in a way that was very constructive. 她批評了我的作品，但是以一種非常建設性的方式——我受益匪淺。
If you don't have anything constructive to say, it's better to say nothing. 要是你沒甚麽有用的話要說，最好保持安靜。
He develops a constructive framework for proving equalities about programs, and shows how to derive the free theorems in a purely syntactic way.
We thank the anonymous peer reviewers for their valuable insights and constructive comments.
For the same reason, however, it may be difficult to make this approach the centrepiece of a constructive nation-wide youth unemployment policy.
Our method is proved later to be constructive when we investigate the behaviour of solutions in the large cell limit.
This paper proposes a new constructive implementation of real numbers.
That is, the role of constructive, proactive parenting in decreasing children's disruptive antisocial behavior patterns was strongest for children who initially had many problems.
Most teachers considered the activities to be constructive, enjoyable and valuable.
I also thank two anonymous referees and an associate editor of this journal for their helpful and constructive comments.
