日期：
来源：雅诚德英语网
This genetic material can be in the form of a gene, a representative of a gene or cDNA, RNA or even a small fragment of a gene.
这种基因材料可以是基因，基因替代物或cDNA、RNA甚至小的基因片段。
This genetic material can be in the form of a gene, a representative of a gene or cDNA, RNA or even a small fragment of a gene.
这种基因材料可以是基因，基因替代物或cDNA、RNA甚至小的基因片段。