trinucleotide

例句：

1. 1. The DNA sequence contains many trinucleotides that are important for gene expression.
   DNA序列中包含许多对基因表达至关重要的三核苷酸。
2. 2.In genetics, a trinucleotide is a sequence of three nucleotides that can be used to identify specific genes.
   在遗传学中，一个三核苷酸是一个由三个核苷酸组成的序列，可以用来识别特定的基因。
3. 3.Researchers have found that certain trinucleotides can affect the expression of genes in plants.
   研究人员发现某些三核苷酸可以影响植物中基因的表达。