a. relating to or designed for or performed on musical instruments
a. 仪器的, 器具的, 可作为手段的
[医] 器械的
1. Music can be instrumental in creating a good atmosphere at a party.
音乐在营造聚会的良好氛围中可以发挥重要作用。
2. The teacher used instrumental methods to help students understand the topic better.
老师使用了工具性的方法来帮助学生更好地理解这个主题。
3. His instrumental support was crucial for the success of the project.
他在项目中的支持对成功至关重要。