1650s, "three successive lines of poetry," from triple; perhaps patterned on doublet. Extended to a set of three of anything by 1733, and to three children at the same birth by 1787 (another word for this was trin, 1831, on the model of twin). Musical meaning "three notes played in the time of two" is from 1801.
实用例句
1. A triplet sleeps amongst its two siblings.
一个三胞胎睡在其两个同胞之间.
来自《简明英汉词典》
2. Because of this coding relationship, triplet of bases is called a codon.
由于这种编码关系, 碱基的三联体被称为密码子.
来自辞典例句
3. The pions form another triplet, electrically different but otherwise alike.
π介子构成另一种三重态, 只是电荷不同,其它方面均相同.
来自辞典例句
4. One highly successful approach utilizes a triplet aspheric lens array.
一种很成功的方法是利用一个三合非球面透镜阵列.
来自辞典例句
5. There are a number of ways in which one can construct a triplet code.