/'kɔːrəs/

n. part of a song that is repeated several times, usually after each verse (= set of lines)

(通常在歌曲每一节后的)副歌，合唱部分;合唱曲

I'll sing the verses and I'd like you all to join in the chorus. 

我来唱主歌，我希望你们都加入副歌。

v. (of a group of people) to say similar things at the same time

齐声说;异口同声地说

"Not now," the children chorused in unison, "we're watching TV."

“现在不要，”孩子们齐声嚷道，“我们正在看电视。