trios
n.
三重奏（ trio的名词复数 ）;
三人一组;
三重奏[三重唱]乐曲;
（小步舞曲、谐谑曲等的）中段;
例句:
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Groups are called duets, trios, quartets , choruses , choirs, etc.
集体表演称之为二重唱 、 三重唱 、 四重唱以及大合唱等等.
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For many, that crippling menage a trios – guilt, inhibition and shame, still lingered in the bedroom.
但是对于她们中的很多人来说, 畸形的三角关系——罪恶 、 禁忌、羞耻 —— 还是出现在她们的卧室里.
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"Nearly Ninety" consists mostly of solos, duets, and trios.
来自NEWYORKER
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The musicians will perform solos, in duets and trios, and all together.
来自NEWYORKER
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Unfortunately, Trichotomy tend to be mentioned alongside trios like The Necks, EST and The Bad Plus.
来自BBC