音乐老师让学生们先做发声练习。

The music teacher asks students to ___vocalize as a warm-up.

他很少公开表达对政策的反对意见。

He seldom ___vocalises his opposition to the policies publicly.

歌手在练习时仔细地发声每一个音符。

The singer carefully ___vocalises each note during practice.