常見例句雙語例句The nitrogenous bases are derivatives of two parent compounds, pyrimidine and purine.核苷的含氮堿基來自兩種復合物，嘧啶和嘌呤。www.cjcu.com.cnBase pairing The bonding relationship between purine and pyrimidine bases in the nucleotides of DNA and RNA.在DNA和RNA的核苷酸中， 嘌呤和嘧啶之間相匹配的關系。 返回 purine base