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- The base ratio of 1:1 for the bases adenine and thymine and the bases cytosine and guanine was the first clue to the specificity of BASE PAIRING in the nucleic acids. 在核酸中的碱基配对高度专一性的原则决定了腺嘌呤与胸腺嘧啶，或鸟嘌呤与胞嘧啶之间的比值为1：1。
- There are just four kinds: adenine, thymine, guanine and cytosine. 只有4种：腺嘌呤、胸腺嘧啶、鸟嘌呤和胞核嘧啶。
- The most abundant bases are cytosine, thiamine, and uracil (pyrimidines) and adenine and guanine (purines). 最丰富的碱基是胞嘧啶，胸腺嘧啶，尿嘧啶，腺嘌呤和鸟嘌呤。
- An adenine on one chain is always matched with a thymine* on the other chain, and a guanine with a cytosine. 在一个链上一个腺嘌呤分子总是与另一个链上的一个胸腺嘧啶相匹配，而一个鸟嘌呤总是与一个胞核嘧啶分子相匹配。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- In DNA, four different bases are found. Two of these, adenine and guanine, are double-ring structures called purines. 在dna中，有四种不同的碱基，其中的两个为腺嘌呤和鸟嘌呤，即称为嘌呤的双环结构。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- 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
- The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
- The nitrogen bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C). 嘌呤一般包括腺嘌呤(adenine，A)和鸟嘌呤(guanine，G)2种，嘧啶有胸腺嘧啶(thymine，T)、胞嘧啶(cytosine，C)和尿嘧啶(uracil，U)3种。
- Flavin adenine dinucleotide See FAD. 黄素腺嘌呤二核苷酸：参见：FAD.
- Guanine and cytosine were more sensitive to HMME. 腺嘌呤和胞嘧啶对血卟啉单甲醚的光动力学损伤更敏感。
- Adenine has a purine ring structure. 腺嘌呤具有嘌呤环的结构。
- 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
- After-tax profit margin is the ratio of net income to net sales. 税後利润率指净收入与净销售之比。
- Nicotinamide Adenine Dinucleotide. NAD. Nadide
- The ratio of men to women was two to one. 男女的比例是二比一。
- 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，附著在脱氧核糖核酸或核糖核酸的糖分子上
- The code consists of combinations of four simple units, called bases, named adenine (A), thymine (T), cytosine (C) and guanine (G). 编码是由四种简单的单位排列组合而成，这四种单位称为碱基，分别是腺嘌呤（A）、胸腺嘧啶（T）、胞嘧啶（C）及鸟粪嘌呤（G）。
