a trine of
表示“三个一组”时，trine 前通常用不定冠词 a。
They formed a trine of leaders.
他们组成了一个三人领导小组。
拱相；三合；三个事物的一组。；两个星体相距120°时的相位。
三个事物的一组。
A group of three things.
两个星体相距120°时的相位。
An aspect of two astrological bodies when 120° apart.
The composer presented a trine of short piano pieces to close the concert.
这位作曲家以三首短钢琴曲作为一组，结束了音乐会。
用法提示：trine 在这里是名词，表示‘三个一组’，指三首钢琴曲构成的组合。
The three friends are a trine, always seen together at school.
这三个朋友是一个三人组，在学校里总是一起出现。
用法提示：trine 在此为名词，意为‘三人一组’，强调三个人常在一起。
On the shelf, a trine of brass candlesticks caught the light.
架子上，三只黄铜烛台作为一个组合吸引了光线。
用法提示：trine 用作名词，指‘三个一组’的实物，即三只烛台组成的整体。
表示“三个一组”时，trine 前通常用不定冠词 a。
They formed a trine of leaders.
他们组成了一个三人领导小组。
trine 作为基数词“三”时，常与定冠词连用，但此用法较罕见。
The trine is the smallest odd prime.
三是最小的奇质数。
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