nonsense codon

例句：

1. 1. The genetic code is a complex system that translates the information from DNA into proteins.
   遗传密码是一个复杂的系统，将DNA的信息转化为蛋白质。
2. 2. In biology, a nonsense codon is a sequence of three nucleotides that codes for an amino acid with no biological function.
   在生物学中，一个无意义的密码子是三个核苷酸序列，它编码的氨基酸没有生物功能。
3. 3. The discovery of the nonsense codon in bacteria has led to important advances in genetic engineering.
   细菌中无意义密码子的发现对遗传工程领域产生了重要的进展。