duo
US
UK duo n: (pair, couple)
SC 一对 yí duì
The duo is inseparable; they even finish each other's sentences.
duo n: (music: duet)
SC 二重唱 èr chóng chàng
SC 二重奏 èr chóng chàng，èr chóng zòu
A cello and violin duo gave an impromptu performance in the park.