声带通过振动产生声音。

The ___vocal ___folds produce sound by vibrating.

医生让他说“啊”，以便检查他的声带。

The doctor asked him to say “ah” to check his ___vocal ___folds.

那位老师在会议上直言不讳地表达了对新课程表的担忧。

The teacher was very ___vocal about her concerns regarding the new schedule during the meeting.

她的嗓音训练帮助她提高了歌唱技巧。

Her ___vocal training helped improve her singing skills.