noun🔗Share嘧啶 A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA: thymine, uracil and cytosine"The science lesson explained that pyrimidines, like thymine and cytosine, are essential building blocks of DNA's genetic code. "科学课上解释说，嘧啶，比如胸腺嘧啶和胞嘧啶，是DNA遗传密码的重要组成部分。chemistrybiochemistrybiologycompoundChat with AIVocabulary GamePractice Reading
