instrumental

有助益的、起關鍵作用的常接 in

She was instrumental in getting the new library built.

新圖書館能夠興建，她功不可沒。

器樂的、樂器演奏的

The album includes three instrumental tracks with no vocals.

這張專輯收錄了三首沒有人聲的器樂曲。

器樂曲、純音樂

He usually listens to instrumentals while he studies.

他讀書時通常聽純音樂。