duets
n. 二重唱；二重奏；双人项目（duet 的复数）
v. 唱二重唱；奏二重奏（duet 的三单形式）
例句
Ive never really thought about doing duets before and so far the situation has never arose.
之前我从没打算过要做二重唱，到目前为止也没有这种安排。
They defend their territories from other antbirds by singing complex duets to signal their combined strength.
它们通过复杂的鸣声二重奏来显示其合作的强大，以此捍卫领地不受其他蚁鸟的侵犯。
