bass part

The tenor sang the bass part in the rehearsal because one singer was absent.

男高音在排练时唱了低音部，因为一名歌手缺席了。

In the music theory class, we learned how to harmonize by writing a bass part that supports the melody.

在乐理课上，我们学习了如何通过编写支撑旋律的低音部来进行和声。

The recording engineer adjusted the volume of the bass part to make it more prominent in the mix.

录音工程师调整了低音部的音量，使其在混音中更加突出。