1、a medieval brass instrument with a clear shrill tone
帶有清晰的尖音音質的中世紀銅樂器。

2、Then a brass instrument enters and what is the name of this brass instrument?
然后一個銅管樂器出現(xiàn)了,那么這個銅管樂器是什么

3、a brass instrument resembling a cornet but with a wider bore
形狀像短號但是帶有粗管的銅樂器。

4、The horn obviously is a brass instrument and what makes the sound is a vibrating column of air.
顯而易見的，圓號是個銅管樂器，它通過震動空氣柱來發(fā)出聲音。

5、Popping frequency The lowest resonance of a brass instrument mouthpiece.
突出頻率(11)銅管樂器吹嘴的最低共振頻率。