建设性的

• constructive

例句

1. 如此重大的问题不得不成为大选中人们激烈辩论的议题，这很令人遗憾。可这场辩论至少应该是建设性的。
   It was regrettable that such great issues had to be the thrust and parry of a general election. But at least the debate should be constructive.