低音键钮

例句：

1. 1. The bass knobs on the piano are easy to use.
   钢琴上的低音键很容易使用。
2. 2. The bass knobs on the guitar are also very important.
   吉他上的低音键也很重要。
3. 3. The bass knobs on the drum set are essential for playing the drums.
   鼓组上的低音键对于演奏鼓来说是必不可少的。