instrumental
adj
1 [pred 作表语]
~ in doing sth being the means of bringing sth about 作为促成某事物之手段; 有帮助; 起作用
Our artistic director was instrumental in persuading the orchestra to come and play for us. 我们的艺术指导大费唇舌请来管弦乐队为我们演出.
2 of or for musical instruments 乐器的; 为器乐用的
instrumental music 器乐曲.