| 释义 |
DEFINITIVE EXAMPLES 权威例句〔GTP〕A nucleotide composed of guanine, ribose, and three phosphate groups and necessary for the synthesis of RNA.三磷酸鸟苷：由鸟嘌呤、核酸和三组磷酸盐组成的核苷核酸，为合成核糖核酸的必备成分美国传统〔base〕One of the purines (adenine and guanine) or pyrimidines (cystosine, thymine, and uracil) that occurs attached to the sugar component of DNA or RNA.碱基：嘌呤（腺嘌呤和鸟嘌呤）或嘧啶（胸嘧啶、胸腺嘧啶和尿嘧啶）的一种，附着在脱氧核糖核酸或核糖核酸的糖分子上美国传统 |