threose nucleic acidWiktionary 原文释义（英文）名词 Noun(biochemistry) An analog of RNA in which the sugar component is threose—considered to be a primordial precursor to RNA词族派生词（1）TNA相关词（9）nucleic acidribonucleic aciddeoxyribonucleic acidpeptide nucleic acidglycol nucleic acidRNADNAPNAGNA