instrumental technique

例句：

1. 1. The new policy is instrumental in promoting economic growth.
   新政策有助于促进经济增长。
2. 2. The instrument was instrumental in solving the problem.
   这个工具在解决问题中起了关键作用。
3. 3. The team's performance was instrumental in securing the victory.
   团队的表现对于赢得比赛起到了决定性的作用。