What they found was that singers stayed more on tune with the pitch written in the musical score when singing solo, versus singing with a partner. And when one partner veered off pitch, the other singer followed her, perhaps to compensate for the error — meaning even though they weren't singing the pitch as written, the resulting duet was more harmonious.
他们发现，相比于和搭档合唱，歌手独唱时的音调与乐谱上的音调更为一致。当搭档音调偏离时，另一名歌手也会跟着她偏离，也许是为了弥补错误——也就是说，即使她们演唱的音调与乐谱上的有出入，但同时出错的演唱效果却更加和谐。
——《科学美国人》
基本释义
A duet is a piece of music sung or played by two people.
n. 二重奏；二重唱
单词duet里的du部分，来源于拉丁语duo，表示“二，两，双”。所以，在英语里包含du单词，多与此相关：
dual adj. 双的；双重的
duel n.（二人）决斗
duplicate adj. 复制的；二重的
duplex adj. 二倍的，双重的；复式的
twosome: A twosome is a group of two people.（两人一组）
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