定音鼓，或者有时称作半球形铜鼓，它正演奏两个不同的音高，实际上在演奏这个音高和另外一个音高，八度音阶和这个五度。

Timpani or as it's sometimes called a kettledrum, and it was playing two different pitches, actually sort of playing this pitch and this pitch, the octave and then the fifth.

youdao

定音鼓一种大的半球形红铜或黄铜鼓，面为羊皮纸，能通过调整拉力调音。

A large copper or brass hemispherical drum with a parchment head that can be tuned by adjusting the tension.

youdao

Timpani or as it's sometimes called a kettledrum, and it was playing two different pitches, actually sort of playing this pitch and this pitch, the octave and then the fifth.

定音鼓,或者有时称作半球形铜鼓,它正演奏两个不同的音高,实际上在演奏这个音高和另外一个音高,八度音阶和这个五度

耶鲁公开课 - 聆听音乐课程节选