啤酒节上，铜管乐队奏出欢快的oompah-pah节奏。

At the Oktoberfest, the brass band played cheerful ___oompah-pah rhythms.

乐队演奏时，孩子们跟着节奏喊着“咚吧吧”。

The kids chanted "___oompah-pah" along with the band's brass section.